Outside heating and air unit wont kick on?

My new trane heating and air unit wont kick on outside when the thermostat is changed. I just used the heat two weeks ago and the unit worked fine. But now the outside unit doesnt kick on when the theromostat is set for either the heat or the Air Conditioning. I flipped the outside breakers and the main breaker to my home, but still nothing happened. The auto fan is working and the vents are blowing air. But the outside fan isnt working and clearly the unit is not working. Does it need freon or have i blown a fuse?

There is a number of things that wont let the outside unit work. Usually if the system is low on freon it will still operate, just shut itself off after a while. If this unit is new though it may be still under warranty. Just call the folks that installed your system to find out. To answer your question though it could be a fuse but something had to make it blow. It could be a transformer, or contactor, or contactor coil, or a capacitor. It could even be your thermostat itself if it isn’t wired correctly. If your unit is not a heat pump, the unit outside would not work in heat mode, only cooling. When the thermostat is set to cool, you should hear a click in the outside unit, then the fan and compresser should come on. If you don’t hear the click you may need a transformer, or the contactor coil might be bad. If it does click and nothing else happens you may need a contactor or a capacitor. Either way I would get a trained tech to troubleshoot your system for you. But if its less than say 5 years old I would defiantly be looking for warranty service with the original installer. Or if you have the paperwork from the installation you can call Trane directly. Anyway, Hope I helped…….

Are central air condition units supposed to run constantly?

One Response to “Outside heating and air unit wont kick on?”

  1. There is a number of things that wont let the outside unit work. Usually if the system is low on freon it will still operate, just shut itself off after a while. If this unit is new though it may be still under warranty. Just call the folks that installed your system to find out. To answer your question though it could be a fuse but something had to make it blow. It could be a transformer, or contactor, or contactor coil, or a capacitor. It could even be your thermostat itself if it isn’t wired correctly. If your unit is not a heat pump, the unit outside would not work in heat mode, only cooling. When the thermostat is set to cool, you should hear a click in the outside unit, then the fan and compresser should come on. If you don’t hear the click you may need a transformer, or the contactor coil might be bad. If it does click and nothing else happens you may need a contactor or a capacitor. Either way I would get a trained tech to troubleshoot your system for you. But if its less than say 5 years old I would defiantly be looking for warranty service with the original installer. Or if you have the paperwork from the installation you can call Trane directly. Anyway, Hope I helped…….
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