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Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6022
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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Just moved into a brand new house with new Hvac unit. Upon

Customer Question

Just moved into a brand new house with new Hvac unit. Upon turning everything on My AC is blowing only hot air. I went out back and noticed that my AC condenser is not working. I have checked all breakers and everything is on this is a brand new unit any help will do
Submitted: 2 years ago.
Category: HVAC
Expert:  airheatman replied 2 years ago.
Do you have a multi meter for checking voltsgae?
Customer: replied 2 years ago.

no i do not

Expert:  airheatman replied 2 years ago.
OK. The easiest way to troubleshoot is wit a meter checking to see where we do and do not have voltage.You can get an inexpensive meter at Lowes or Walmart for about 15 bucks if you want to. Other than that we ca try a few hands on things.
Customer: replied 2 years ago.

we can try some hands on troubleshooting and if those dont work I will run and buy a meter. However if you dont mind I would need you to walk me through how to measure voltage.

Expert:  airheatman replied 2 years ago.
No problem.Does indoor fan come on?
Customer: replied 2 years ago.

Yes it does everything comes on like normal however it just blows hot air.

Expert:  airheatman replied 2 years ago.
OK lets go to thermostat. Remove the front cover. Then remove wires from R and Y terminals on thermostat and touch the wires together.Let me know if outdoor unit comes on.
Customer: replied 2 years ago.

no it does not come on.

Expert:  airheatman replied 2 years ago.
Have someone stand by outdoor unit and tell me if you hear a click in the outdoor unit when touching those wires and disconnecting them.
Customer: replied 2 years ago.

they can not hear a click

Expert:  airheatman replied 2 years ago.
OK. lets look in the outdoor unit and make sure installing contractor has connected the low voltage wires from thermostat.If you can give me model on outdoor unit< I will tell you which wires to check.
Customer: replied 2 years ago.

not sure where the model number is ***** just says philco

Expert:  airheatman replied 2 years ago.
Shouldbe a label on outside of the unit. Remove the panel and see if control wires coming from thermostat are connected.
Customer: replied 2 years ago.

were are he control wires located?

Expert:  airheatman replied 2 years ago.
That is the small set of wires coming from thermostat to outdoor unit.Usually 18 gauge wires in a brown sheathing.
Customer: replied 2 years ago.

no they arent

Expert:  airheatman replied 2 years ago.
Not there or not connected?
Customer: replied 2 years ago.

they are not connected

Expert:  airheatman replied 2 years ago.
OK this is why it is not coming on.Do you see that label with a model or can you tell me how many wires you have and what terminals are on the unit (If not terminls, what color pigtail wires)

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