Coil Troubleshooting

What to look for and what to do!

Coil Troubleshooting

Your HVAC system works to keep your home at a comfortable temperature and the coil is fundamental to ensuring this comfort. If the performance of your air conditioner, heat pump or air handler seems inconsistent, it could be related to the coil that houses the refrigerant.

Most of the time a problem with the coil will require a Trane Comfort Specialist™ to come take a look. There are, however, a few small problems that can be fixed without calling a technician. Listed below are some of those common problems and what you can do.

Disclaimer: The following information is for educational purposes only. Tampering with your system may void your warranty. If you have any questions about your system, call a Trane Comfort Specialist™.

Need Emergency Service?

If this is an emergency, then please contact local Trane Comfort Specialist™ for assistance regarding your system’s coil.

Contact a Dealer Find a Dealer
Before you call for service, check the following:
No heating or cooling
Possible cause It could be the result of a clogged cooling coil. Debris can easily stick to the inlet side of the cooling coil in your unit. Ordinary house dust as well as debris like soot and pollen can all block up indoor air handler coils as well.
Recommended Action Be sure to clear away any tall grass, sticks, or leaves that may be surrounding your outdoor unit. For your indoor air handler, try to wipe away any buildup of dust and change the air filter often.
Ice or frost forming on coil
Possible cause There could be a leak of refrigerant which has caused frost or ice to form on the coil. Leaks can sometimes happen when refrigerant lines rub together or from ice pick damage.
Recommended Action If you see ice or frost forming on the coil, you will need to contact a Trane Comfort Specialist™ to properly address the issue.
Coil isn’t functioning properly
Possible cause This could be the result of damaged or bent coil fans.
Recommended Action Examine your cooling coil for any bent fins. If only 10% of the fins on the coil surface are bent, then you should be able to straighten and clean them with a cooling coil comb. If the damage is far more extensive, you will need a Trane Comfort Specialist™ to assist.
Browse troubleshooting tips for:
All Troubleshooting
Top of Page