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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™.

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COILS

TROUBLESHOOTING GUIDE

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. 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™.

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COILS

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.
  • POSSIBLE CAUSE: The evaporator coil could be clogged or dirty causing it to freeze and reduce the unit’s cooling capacity. RECOMMENDED ACTION: Try turning the thermostat off for 1-3 hours to see if it will defrost. Also, check for signs of water leakage below the indoor unit. If there is a leak and you are unable to defrost the coil, contact your local Trane Comfort Specialist™

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.

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