Have HVAC Questions? Ask an HVAC Expert for Answers
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If I am unable to help you any further it may become necessary for you to contact a qualified local service provider, who has the proper testing equipment and can perform much more detailed onsite troubleshooting, after which they can discuss the best cost worthy solutions with you.
are you able to get the fan on in the house?a
this sounds like a main electrical problem
perhaps due to the battery backup on the thermostat?
the system requires 120v from the heater/evaporator area, then the transformer steps down to 30v for the themostat, thermostat sends low voltage back to heater fan/blower, and also outside to condensing unit.
If you have no power at heater (even with thermostat features of heat/cool off and fan on, the fan should be running. If it is not running here is an electrical problem at the breakers or possible the transformer
As a qualified expert, I am only able to offer you some basic and specific advice via this email/text, which may or may not have been sufficient enough to answer your question right now to your satisfaction.
If you do not have any electrical testing equipment, you may be able to determine exactly what or where the actual problem is and it might become necessary for you to contact a qualified local service provider, who has the proper testing equipment and can perform much more detailed onsite troubleshooting, after which they can discuss the best cost worthy solutions with you.
you did mention the house as 1 year old, you might consider using your home warranty plan, it could save you a lot of money if the problem is expensive to resolve.
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Sorry I wasn't able to provide more troubleshooting advise, but it is a bit hard to do over the internet and without the proper testing equipment.
Greetings… Just following up to see if you were still needing some help answering your question? If not, I would greatly appreciate it if you could take a few seconds to complete the 5 star rating questionnaire, which will help close out your question.