Trane Air Conditioner Troubleshooting - Common Problems and Solutions

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Last updated: 
April 24, 2024

Trane Air Conditioner Troubleshooting: A Homeowner's Guide


Trane is an HVAC unit reputable for being dependable and of the highest quality. Nevertheless, there may be times when maintenance and troubleshooting become necessary. According to, there is an easy step-by-step guide for troubleshooting that you can follow before calling your local Trane Comfort Specialist™ in case there might be a serious problem with your unit. This information will help the Trane Comfort Specialist™ have an idea of what the issue might be beforehand. It is not encouraged to try to maintain your HVAC system yourself, so noting the mentioned symptoms that are stated on the website is the best step to take before calling your Trane Comfort Specialist™ for Trane air conditioner troubleshooting advice.

Common Issues

1. No Cold Air

The possible basis for this problem could be a coil that is congested. To avoid this issue, keep the unit clear of any foliage or debris that might cause a blockage. Another possible cause could be the filter is congested with dirt and dust. Replace the filters regularly. If you are unsure of how often to change your filter or where the filter is located, please consult your local Trane Comfort Specialist™ for Trane air conditioner troubleshooting recommendations. Another possibility for no cold air is that your thermostat is not set properly. Try turning the thermostat off and then back on to see if that may help with the issue, then you can set it to the temperature that you desire for your home or business.

2. No Air Movement

A possible reason for no air movement is a blown fuse or an open circuit breaker. It is recommended to change the blown fuse or reset the circuit breaker to possibly fix this issue. Also, check the return grills for obstruction. If you are unsure of how or where to check, please consult your local Trane Comfort Specialist™ for Trane air conditioner troubleshooting advice.

3. System Running Constantly

It is probable that your thermostat is set higher than it should be. It is advised to turn the thermostat off and then back on and then correct it to a level that is comfortable for your home or business.

4. The Drain Pan Is Overflowing

The pan under the unit inside your home or business collects condensation which is supposed to be dispersed into a drainage pipe. If this is the problem, it is possible the electric pump that moves the water has become unplugged or there might be an obstruction in the pipe itself. Please consult your local Trane Comfort Specialist™ for Trane air conditioner troubleshooting advice if you need help with this problem.

Tools You'll Need for the Job

  • A battery-powered drill - 18 volts minimum is recommended, with two batteries and a charger. A drill usually comes with a Phillips bit, but make sure you buy a 1/4" hex bit for this is the most common kind of screw that would be used in HVAC repairs.
  • Electric tester – with HVAC repairs, you will be working with live electrical power, so it's best to have an electrical tester, preferably one that can perform multiple functions such as having a multi-meter.
  • Screwdrivers - Various sizes and types of screwdrivers will always be considered valuable. Screwdrivers with protected handles are the greatest choice to make sure you are safe from electrical shock.
  • Hex head nut drivers – Most HVAC systems are built and installed with hex-head screws and bolts. Three sizes are most common: 1/4", 3/8", and 5/16".

Furnace Troubleshooting

1. Make Sure the Thermostat Is Set on Heat

It's possible not to have the thermostat set properly, so make sure to set it at a temperature that will turn the furnace on.

2. Check If the Filter Is Clean

A congested filter will limit the airflow of the furnace and although it will continue to run, it will run with less heated airflow and run less efficiently.

3. Change the Thermostat Batteries

Although most thermostats are connected to the electrical system, some use batteries. If you are not sure, please call your local Trane Comfort Specialist™ for Trane air conditioner troubleshooting advice. The ones that do use batteries will flash a low-battery symbol when they need to be replaced.

4. Check the Gas Valve

First, make sure the valve is not set in the off position. If it happens to be on and if you have other appliances that run on gas, check to see if they are working to make sure you don't have a problem with a gas line. If any of these issues are not easily fixed, please consult your local Trane Comfort Specialist™ for Trane air conditioner troubleshooting advice.

Caution Notes

  • One bit of advice is to have a carbon monoxide detector with fresh batteries near the furnace always. Carbon monoxide, which is colorless and odorless, can become an issue during repairing and/or maintaining your HVAC system.
  • It's also best to turn off the power switch when performing basic maintenance.
  • If you have severe allergies, it is suggested to use permanent HEPA type filters. However, make sure they are cleaned regularly. Another way of controlling the allergens coming into your home or business is covering the duct with a filter. In the past, people have placed a piece of cheesecloth over the ducts, but companies now offer special types of filters that you can Velcro over the duct. Please ask your local Trane Comfort Specialist™ for Trane air conditioner troubleshooting advice about what is offered regarding this type of filter.


A knowledgeable and experienced homeowner in HVAC do-it-yourself maintenance and repairs will save money with this. They will have a healthier, more comfortable home, especially by having the basic facts. It's important to use these advised troubleshooting steps, as well as know when the issue is beyond your control. This may make you not need the assistance of a Trane Comfort Specialist™.

Are you ready to attempt maintenance on your HVAC system or does it seem it needs repair? Trane offers various ways to discuss or ask questions via their Facebook page, as well as their YouTube channel. There may be some of you who have been very successful in this adventure. In this case, you could share your experiences with others who are contemplating maintenance and repair on their system. Please feel free to do so and by keeping the communication lines open. Your advice may help another homeowner in a way you did not consider. (n.d.). Troubleshooting Guide. Retrieved from .

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