How To Fix A Rheem Pool Heater: Troubleshooting Tips - Pool Tips USA (2024)

If you own a pool, you know how frustrating it can be when your pool heater stops working. A malfunctioning heater can leave you with a cold pool and no way to enjoy it. Fortunately, many issues with a Rheem pool heater can be resolved through some simple troubleshooting steps.

In this article, we’ll provide you with the information you need to troubleshoot your Rheem pool heater and get it back up and running. We’ll go over the most common problems that can occur with your pool heater, and the steps you can take to fix them.

Whether you’re a new pool owner or a seasoned pro, this guide will provide you with the knowledge you need to maintain and repair your pool heater. So, let’s dive in and get started!

Read on to learn more about how to fix a Rheem pool heater and get your pool back to the perfect temperature for you and your family to enjoy.

Check The Power Source

When you find that your Rheem pool heater isn’t working, one of the first things you should check is the power source. Sometimes, the problem is as simple as a tripped circuit breaker or a blown fuse. To start, check the power source and make sure it’s turned on. If the circuit breaker is tripped, reset it. If the fuse is blown, replace it. It’s important to check the power source before moving on to more complicated troubleshooting steps.

Another important aspect of checking the power source is ensuring that the power supply voltage is correct. The voltage level can be found in the owner’s manual or on the unit itself. Using a multimeter, check the voltage level of the power supply. If the voltage level is lower than recommended, it can cause your pool heater to malfunction.

If the power supply voltage is correct, but the pool heater still isn’t working, you may need to inspect the wiring. Check for any loose connections, broken wires, or other damage. Tighten any loose connections and replace any damaged wires. Faulty wiring can cause the pool heater to malfunction, so it’s important to address any wiring issues as soon as possible.

Finally, if you’ve checked the power source, the voltage level, and the wiring, but the pool heater still isn’t working, it’s time to call a professional. A certified technician can diagnose and repair any issues that may be preventing your Rheem pool heater from working properly.

Check The Power Source

Make Sure The Circuit Breaker Is On

If your Rheem pool heater is not turning on, the first thing you should check is the circuit breaker. Look for the circuit breaker that controls the power to the pool heater and make sure it is in the “on” position. If the circuit breaker has tripped, reset it and try turning on the pool heater again.

Power Supply is another factor to check. Make sure the power supply is not disconnected, and if you’re using an extension cord, it’s plugged in and not damaged. Also, check if the outlet you’re using is GFCI protected. If the outlet has tripped, try resetting it.

Control Panel is another part of the power source to inspect. Ensure that the control panel is receiving power. You can do this by checking if the lights on the panel are on. If the control panel is not getting power, then you might have a faulty power switch or a loose connection.

Internal Breakers inside the pool heater can also cause power issues. Check the internal breakers and reset them if needed. Refer to the owner’s manual for the specific location of the breakers.

Once you have checked all of the power sources, turn on the pool heater and see if it’s working correctly. If not, move on to the next troubleshooting tip.

Test The Outlet

If the circuit breaker is on and the heater is still not working, the next step is to test the outlet. You can use a voltage tester to ensure that the outlet is getting power. Follow these steps:

1. Unplug the heater: Before testing the outlet, make sure the heater is unplugged from the power source.
2. Test the outlet: Use a voltage tester to check if the outlet is receiving power. Insert the probes into the outlet slots, and if the tester lights up, then the outlet is working.
3. Check the wiring: If the outlet is not getting power, check the wiring connections. Make sure the wires are connected tightly and that there are no loose or damaged wires.

If the outlet is not receiving power or the wiring connections are damaged, you may need to call a professional electrician to fix the issue.

Check The Wiring Connections

Loose or damaged wiring connections can cause problems with your Rheem pool heater. If the connections are loose, you may need to tighten them or replace them altogether. If the wiring is damaged, it’s best to call a professional to repair or replace it.

First, check the wiring connections on the heater and ensure that they’re tight and secure. Next, check the wiring connections at the breaker box and make sure they’re tight as well. If you notice any loose connections, tighten them with a screwdriver.

If you’re unsure about the wiring or how to tighten the connections, it’s best to contact a professional. Attempting to fix wiring issues without proper knowledge and experience can be dangerous and cause further damage to your pool heater.

Inspect The Thermostat

When troubleshooting a pool heater that’s not working, it’s important to inspect the thermostat. The thermostat is responsible for maintaining the desired temperature of the water in the pool.

Step 1: Begin by checking the thermostat settings to ensure they are correct. If the settings are incorrect, adjust them accordingly and see if this resolves the issue.

Step 2: Next, check the wiring connections to the thermostat. Loose or disconnected wires can cause the thermostat to malfunction, resulting in issues with the pool heater.

Step 3: If the wiring connections are good, use a multimeter to test the thermostat for continuity. If there is no continuity, the thermostat is faulty and needs to be replaced.

Step 4: Finally, if the thermostat is working correctly, check the temperature sensor. A faulty temperature sensor can cause the thermostat to malfunction and result in issues with the pool heater.

Test The Thermostat Sensor

If your Rheem pool heater is not working properly, the thermostat sensor may be malfunctioning. Follow these steps to test the sensor:

• Step 1: Turn off the power to the heater.
• Step 2: Locate the thermostat sensor near the heater’s inlet and outlet pipes.
• Step 3: Disconnect the sensor from the control panel.

Once you have completed these steps, use a multimeter to check the resistance of the sensor. If the resistance is not within the manufacturer’s specifications, you will need to replace the sensor.

Testing the thermostat sensor is a simple and effective way to diagnose issues with your Rheem pool heater. If you find that the sensor is not working properly, replacing it can often solve the problem.

Calibrate The Thermostat

If you’ve checked the thermostat sensor and it seems to be functioning properly, but you’re still having issues with your Rheem pool heater, you may need to calibrate the thermostat. Here’s how:

Step 1: Turn off power to the pool heater.

Step 2: Remove the thermostat cover to expose the calibration dial.

Step 3: Use a small screwdriver to adjust the dial until the temperature on the thermostat matches the actual water temperature.

It’s important to note that the calibration process may vary depending on the model of your Rheem pool heater. Consult your owner’s manual for specific instructions on how to calibrate your particular unit.Calibrating your thermostat can help ensure that your pool water is being heated to the desired temperature, which can improve the overall performance and efficiency of your Rheem pool heater. If you’re still experiencing issues with your pool heater after calibrating the thermostat, it may be time to call in a professional for further troubleshooting and repairs.

Examine The Pilot Light

Turn off the gas supply: Before attempting to examine the pilot light, make sure to turn off the gas supply to the heater. This will prevent any dangerous gas leaks or fires.

Remove the cover: Once the gas supply is turned off, remove the cover from the heater and locate the pilot light. The pilot light is typically located near the bottom of the heater and can be identified by a small flame.

Clean the pilot light: The pilot light can sometimes become clogged with dirt or debris, which can cause it to malfunction. Use a soft-bristled brush to gently clean the pilot light and remove any debris that may be present.

Check The Gas Supply

If your furnace has a pilot light and it won’t stay lit, the gas supply may be the issue. Here are some steps to check:

• Check the gas valve: Make sure the gas valve to your furnace is fully open. You may also want to check that the gas line valve leading to the furnace is open.
• Look for leaks: Use a gas leak detector or a solution of water and dish soap to check for any gas leaks around the gas supply line or furnace. If you detect a leak, turn off the gas immediately and call a professional.
• Inspect the thermocouple: If the gas valve is open and you still can’t get the pilot light to stay lit, the issue may be with the thermocouple. The thermocouple is a safety device that detects if the pilot light is on and if it’s not, it will shut off the gas supply. Check the thermocouple to make sure it’s properly connected and free from any dirt or debris.

It’s important to be cautious when dealing with gas. If you’re not comfortable checking the gas supply yourself, it’s best to call a professional.

Clean The Filter

If your furnace is not working efficiently or not working at all, it may be time to clean the filter. Over time, dust, dirt, and debris can clog the filter, making it difficult for air to pass through. This can result in reduced airflow and increased energy costs.

Before cleaning the filter, turn off the furnace. Locate the filter and remove it from the furnace. You can clean the filter by either vacuuming it or washing it with soap and water.

If you decide to wash the filter, make sure to let it dry completely before putting it back in the furnace. Once the filter is clean and dry, replace it back in the furnace.

Remember to clean or replace the filter at least once a month during the heating season. This will not only help your furnace run more efficiently but also improve the indoor air quality of your home.

Remove The Filter

To clean the filter, you will need to first remove it from the unit. The filter is typically located behind a panel on the front, back, or side of the furnace or air conditioner. Refer to your owner’s manual for specific instructions on how to remove the filter.

Before removing the filter, turn off the furnace or air conditioner to prevent the fan from pulling in dirt and debris while the filter is removed. You may also want to wear gloves or use a mask to avoid getting dust and dirt on your hands or in your lungs.

Once you have located the filter and turned off the unit, remove the filter carefully by pulling it out of its slot. Be sure to note which way the filter was facing so you can replace it correctly.

Clean The Filter Element

When cleaning the filter element, start by turning off the system and removing the filter. Check for any visible damage and replace if necessary.

Next, gently clean the filter with a soft brush or by rinsing it with water. Be careful not to damage the filter material.

For more thorough cleaning, you can use a mild detergent and warm water. Rinse the filter thoroughly and allow it to dry completely before re-installing it.

Remember to clean or replace the filter regularly to ensure the efficient and effective operation of your system.

Reinstall The Filter

Once the filter has been properly cleaned and dried, it is time to reinstall it. Make sure that it is inserted in the same orientation as before, with the airflow arrow pointing in the correct direction.

If the filter is not inserted properly, it can lead to reduced airflow and decreased efficiency, as well as potentially damaging the system.

After inserting the filter, make sure that it is securely in place and that there are no gaps around the edges. This will ensure that all air is being filtered and that there is no leakage around the edges.

Flush The System

Step 1: Turn off the power supply of the furnace or air conditioning system. This is important to ensure your safety while flushing the system.

Step 2: Locate the drain valve at the bottom of the condenser or evaporator unit. Attach a hose to the valve and direct the other end of the hose to a drainage point.

Step 3: Turn on the water supply and let it run through the system for at least 5 minutes. This will help remove any debris or sediment from the system.

Step 4: Once the water runs clear, turn off the water supply and disconnect the hose from the drain valve.

Step 5: Finally, turn the power supply of the furnace or air conditioning system back on and inspect the system to ensure that it is running smoothly.

Drain The Water From The Heater

Prepare for the process: Turn off the power supply and gas supply of the water heater. Check the temperature of the water using a thermometer. If the temperature is too high, wait for the water to cool down.

Find the drain valve: Locate the drain valve on the water heater. It is usually located near the bottom of the tank. You can attach a garden hose to the valve to direct the water to a drain or outside.

Drain the water: Turn the drain valve counter-clockwise to open it. The water will start to flow out of the tank. Make sure the water is flowing in a safe direction. Keep an eye on the water and adjust the hose if necessary. When the water has stopped flowing, close the valve by turning it clockwise.

Flush The System With A Cleaning Solution

Step 1: Turn off the power supply to the heater to prevent any accidents while working on the system.

Step 2: Close the water inlet valve to the heater to prevent new water from entering the system while you flush it.

Step 3: Attach a hose to the drain valve of the heater and run it to a drain or bucket to collect the water that will be drained.

Step 4: Open the drain valve and allow the water to flow out of the heater completely. After the water stops flowing, close the valve.

Step 5: Mix a cleaning solution with water as per the instructions on the package.

Step 6: Attach a new hose to the drain valve of the heater and run it to the bucket or drain.

Step 7: Open the water inlet valve to the heater and pour the cleaning solution through the open valve. Allow the solution to sit for at least an hour to let it clean the inside of the tank and pipes.

Step 8: After an hour, open the drain valve and let the cleaning solution flow out of the heater completely.

Step 9: Close the drain valve and remove the hose from it.

Step 10: Open the water inlet valve and allow the water to flow into the heater to rinse out any remaining cleaning solution. Let the water run for a few minutes until it runs clear.

Note: Dispose of the cleaning solution properly as per the instructions on the package.

Inspect The Gas Line

Gas leaks can be deadly, so it is important to inspect the gas line regularly. If you smell gas or suspect a leak, turn off the gas immediately and call a professional for help.

To inspect the gas line, first, check the fittings and connections for signs of damage or wear. Use a solution of soap and water to check for leaks. If bubbles form, there is a leak. Tighten the fittings if possible and replace damaged parts.

Next, check the pipes for dents, cracks, or corrosion. Any of these can cause a leak. If you find any damage, replace the pipe or call a professional for help. Do not attempt to repair a damaged gas line on your own.

Make sure the gas line is properly grounded to prevent electrical shocks. Check for loose or corroded grounding wires and connections. Replace or repair any damaged wires or connections.

Finally, check the shut-off valve. Make sure it is in good condition and works properly. It should be easy to turn and should shut off the gas completely. If it doesn’t work, call a professional for help.

Check For Leaks

Step 1: Before checking for leaks, turn off the gas supply valve and make sure there are no open flames or sparks nearby.

Step 2: Inspect the gas line and connections for any visible signs of damage, corrosion or wear. Use a flashlight if necessary.

Step 3: Apply a mixture of soap and water to the gas line and connections using a brush or spray bottle.

Step 4: Turn on the gas supply valve and observe the gas line and connections for any bubbles that form. If there are bubbles, this indicates a leak.

Step 5: If you detect a leak, turn off the gas supply valve immediately and contact a professional to repair the gas line.

Inspect The Gas Valve

When inspecting the gas valve, there are a few things to look out for. Corrosion can cause the valve to fail, so it’s important to check for any signs of rust or damage. If you notice any issues with the valve, it’s best to have it replaced.

You should also check the position of the valve to make sure it’s fully open. If it’s not, you may experience issues with the gas flow. Additionally, make sure the pressure is set correctly for your particular system. Incorrect pressure can also lead to issues with the gas flow and cause the system to malfunction.

Finally, it’s important to check the connections to the gas valve to ensure they are tight and secure. Loose connections can cause gas leaks, which can be extremely dangerous. If you notice any issues with the connections, it’s important to have them addressed immediately.

In summary, when inspecting the gas valve, be sure to check for corrosion, ensure the valve is fully open, check the pressure, and inspect the connections. Taking these steps can help ensure your system is functioning properly and safely.

Clean The Burner Orifice

One of the most important steps in maintaining your gas water heater is keeping the burner orifice clean. Over time, the orifice can become clogged with debris, reducing the efficiency of the heater and causing it to work harder than necessary.

To clean the orifice, first turn off the gas and water supply to the heater. Then, remove the burner assembly and use a wire brush to gently clean the orifice. Make sure to remove any debris that may have accumulated inside the assembly as well.

Once the orifice and assembly are clean, reassemble the burner and turn the gas and water supply back on. Finally, light the pilot and check to make sure the heater is working properly.

It’s recommended that you clean the burner orifice at least once a year to ensure that your gas water heater continues to operate efficiently and safely.

Test The Pressure Switch

Pressure switch: A safety device that senses when the furnace is on and regulates air pressure.

Step 1: Turn off power to the furnace and remove the pressure switch from the furnace.

Step 2: Use a multimeter to test the switch for continuity. If the switch is open, it needs to be replaced.

Step 3: If the switch has continuity, reconnect it to the furnace and turn the power back on.

Step 4: Observe the furnace for proper operation. If the switch is faulty, the furnace may not turn on or may shut off unexpectedly.

Inspect The Pressure Switch

What is a pressure switch? A pressure switch is a safety device that monitors the pressure inside the furnace or air conditioning unit and ensures that it is operating within safe levels.

Why is it important to inspect the pressure switch? Over time, the pressure switch can become clogged or damaged, which can cause it to malfunction. This can result in a range of problems, from the unit not turning on to overheating and even posing a safety risk.

How to inspect the pressure switch? First, turn off the power to the unit and remove the cover from the pressure switch. Inspect the switch for any signs of damage or wear, such as cracks or corrosion. If the switch appears to be in good condition, use a multimeter to test the continuity of the switch. If the switch does not show continuity, it may need to be replaced.

When should you replace the pressure switch? If the pressure switch is damaged, has excessive wear or corrosion, or fails the continuity test, it should be replaced immediately. Ignoring a faulty pressure switch can result in serious problems, including the unit failing to turn on or causing a fire.

Test The Pressure Switch With A Multimeter

Before you test the pressure switch with a multimeter, make sure the furnace is turned off and the power is disconnected to prevent electrical shock. Next, remove the wires from the pressure switch terminals and set your multimeter to the ohms setting.

With the multimeter leads, touch one lead to each of the pressure switch terminals. The multimeter should read infinite resistance or “OL” if the pressure switch is open. If the pressure switch is closed, the multimeter should read a low resistance or zero ohms.

If the pressure switch is not functioning properly, you may need to replace it. Refer to the manufacturer’s instructions or contact a licensed HVAC technician for assistance.

Frequently Asked Questions