[Image of Goodman furnace heating when AC is on]
Introduction
Hey readers,
If your Goodman furnace is heating when your AC is on, you’re not alone. This is a common problem that can be frustrating and uncomfortable. But don’t worry, there are several possible causes and solutions. In this article, we’ll explore the reasons why your Goodman furnace may be heating when your AC is on and provide step-by-step instructions on how to fix it.
Common Reasons for Goodman Furnace Heating When AC Is On
There are several reasons why your Goodman furnace may be heating when your AC is on. Some of the most common include:
Faulty Thermostat
The thermostat is responsible for telling your furnace when to turn on and off. If the thermostat is faulty, it may send the wrong signal to the furnace, causing it to heat when it should be cooling.
Crossed Wires
The wires that connect the thermostat to the furnace can become crossed, which can also cause the furnace to heat when it should be cooling.
Dirty Condenser Coil
The condenser coil is located outside the house and helps to dissipate heat from the refrigerant. If the condenser coil is dirty, it can restrict airflow and cause the furnace to overheat, which can lead to it heating when it should be cooling.
Refrigerant Leak
A refrigerant leak can cause a drop in refrigerant levels, which can lead to the furnace overheating and heating when it should be cooling.
How to Fix a Goodman Furnace That Is Heating When AC Is On
If your Goodman furnace is heating when your AC is on, there are several things you can do to try to fix the problem:
Check the Thermostat
The first step is to check the thermostat. Make sure that it is set to "cool" and that the temperature is set lower than the current room temperature. If the thermostat is set correctly, move on to the next step.
Check the Wires
Next, check the wires that connect the thermostat to the furnace. Make sure that they are all connected securely and that there are no crossed wires. If any of the wires are loose or crossed, reconnect them and try again.
Clean the Condenser Coil
If the thermostat and wires are both working properly, the next step is to clean the condenser coil. To do this, turn off the power to the AC unit and remove the cover. Use a garden hose to spray down the coil and remove any dirt or debris. Once the coil is clean, put the cover back on and turn the power back on.
Check for Refrigerant Leaks
If cleaning the condenser coil does not solve the problem, you may have a refrigerant leak. To check for a refrigerant leak, look for any signs of oil or refrigerant around the AC unit. If you see any leaks, you will need to call a qualified technician to repair them.
Troubleshooting Table
The following table provides a summary of the troubleshooting steps discussed above:
| Problem | Possible Cause | Solution |
|---|---|---|
| Furnace heating when AC is on | Faulty thermostat | Check the thermostat and replace it if necessary |
| Furnace heating when AC is on | Crossed wires | Check the wires and reconnect them securely |
| Furnace heating when AC is on | Dirty condenser coil | Clean the condenser coil with a garden hose |
| Furnace heating when AC is on | Refrigerant leak | Call a qualified technician to repair the leak |
Conclusion
If you have tried all of the troubleshooting steps above and your Goodman furnace is still heating when your AC is on, you may need to call a qualified technician for further assistance.
Readers, thanks for reading! If you found this article helpful, be sure to check out our other articles on home maintenance and repair.
FAQ about Goodman Furnace Heats When AC is On
1. Why does my Goodman furnace heat when the AC is on?
Answer: This issue can be caused by a malfunctioning reversing valve, a faulty thermostat, or a problem with the control board.
2. How can I fix the reversing valve?
Answer: The reversing valve controls the flow of refrigerant between the heating and cooling coils. If it’s malfunctioning, it can cause the furnace to heat when the AC is on. To fix it, you’ll need to replace the reversing valve.
3. How do I know if the thermostat is faulty?
Answer: A faulty thermostat can send incorrect signals to the furnace, causing it to heat when it shouldn’t. Signs of a faulty thermostat include inaccurate temperature readings, sudden temperature changes, and intermittent heating.
4. How can I fix a faulty control board?
Answer: The control board manages the furnace’s operations. If it’s faulty, it can cause various issues, including causing the furnace to heat when the AC is on. To fix it, you’ll need to replace the control board.
5. Can a dirty air filter cause this problem?
Answer: Yes, a dirty air filter can restrict airflow, which can lead to overheating and cause the furnace to heat when the AC is on. Ensure you replace your air filter regularly.
6. How do I check the wiring?
Answer: Loose or damaged wiring can also cause this issue. Inspect the wiring connections between the thermostat, furnace, and AC unit for any loose or damaged wires. Tighten or replace the wires as necessary.
7. Is it safe to operate the furnace if it’s heating when the AC is on?
Answer: No, it’s not safe to operate the furnace if it’s heating when the AC is on. This issue can lead to overheating, reduced efficiency, and potential damage to the furnace.
8. How can I prevent this problem from happening again?
Answer: Regular maintenance can help prevent this problem from recurring. This includes cleaning the air filter, inspecting the wiring, and having the furnace serviced by a qualified HVAC technician annually.
9. Can I fix this problem myself?
Answer: Unless you have experience working with HVAC systems, it’s generally recommended to contact a qualified HVAC technician to diagnose and fix the problem to avoid causing further damage to your system.
10. How much does it cost to fix this problem?
Answer: The cost of fixing this problem will vary depending on the cause and the severity of the issue. It’s best to contact a qualified HVAC technician for an accurate estimate.
