When something is wrong with your HVAC system, it will communicate it to you with error codes and flashing lights. Some of the problems have easy fixes and don’t require attention from certified HVAC technicians. Sometimes, turning off the unit and resetting it back on will do. However, you need to check the error codes you see and not postpone troubleshooting.
What does Trane Error 126 mean?
Trane Error code 126 informs us about a communication malfunction between the thermostat and the HVAC unit. Try to switch off the furnace and your AC unit, wait for a bit and switch them back on. See if the communication is fine. Should the problem persist, you must contact a local technical service provider.
If you have Trane 950 unit, the Error Code 126 will signal a low-temperature lockout.
When the thermostat has a broken electrical circuit (it can happen when the outdoor temperature becomes too low), the Trane thermostat shows the 126 error code. Either way, the most efficient solution to deal with the 126 error code is to reset the entire system.
Troubleshooting Trane Error 126
To eliminate the error code 126 on a Trane 950 unit, you have to turn off both the inside and outside units, wait for a couple of minutes and then turn both units back on. The operation will reset the lockout fault. If you have a Trane Comfort Link II thermostat, the error code 126 shows a low-temperature lockout.
If the error code doesn’t go away, you will need to call a certified HVAC technician to service the HVAC unit.
It’s essential to know how to test a Trane defrost board. Here’s what you need to do to check out the defrost sensor:
- Remove power from the condenser
- Look for the defrost sensor from the condenser. Remove the sensor and unplug it from the control board.
- Put the sensor in a container with ice water. Use a multimeter, ohm across the terminals—the sensor should read zero ohms (closed).
