How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Phil Your Own Question
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6022
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
Type Your HVAC Question Here...
Phil is online now
A new question is answered every 9 seconds

I have a 96% efficient furnace with no AC unit. The

Customer Question

I have a 96% efficient furnace with no AC unit. The instructions are unclear as to how to hook up the transformer and thermostat to the unit. The transformer that they sent with the unit for the comfortNet system appears to be a 240 transformer. Please help me figure this out.
Submitted: 1 year ago.
Category: HVAC
Expert:  HVAC Guru replied 1 year ago.

Hello and thanks for using this service, if you have been waiting do not worry or get upset I am just one of the techs on here and I try to get to as many customers as I can and I just picked up your question now. Please give me time to respond sometimes I get your replies late so there may be a delay in my response.

Most of the transformers can be wired for either do you see the markings on the transformer?

Customer: replied 1 year ago.
1 is common. 2 is 208. 3 is 240. I had this hooked up, but the thermostat wouldn't talk to the unit. And the transformer was very hot.
Expert:  HVAC Guru replied 1 year ago.

Your unit is 120 is it not?

Customer: replied 1 year ago.
Customer: replied 1 year ago.
Are you still there?
Customer: replied 1 year ago.
This is taking too long. We are not interested in your service.