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Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 5648
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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The outside unit will not turn on. The contact or & run

Customer Question

The outside unit will not turn on. The contact or & run capacitor has been replaced
JA: Did you double-check the thermostat? And what about the unit's filters?
Customer: Yes. New filters in the HVAC unit in the attic & the thermostat is on ... The blower unit in the HVAC unit turns on just not the outside unit
JA: Do you plan on doing the work yourself?
Customer: yes
JA: Anything else we should know to help you best?
Customer: no
Submitted: 3 months ago.
Category: HVAC
Expert:  airheatman replied 3 months ago.

Sounds like we may not be getting 24v to contactor.Do you have a multi meter so we can troubleshoot?

Customer: replied 3 months ago.
It's getting the 24v
Expert:  airheatman replied 3 months ago.

Next check 230v in and out of contactor

http://i.imgur.com/pT2mWjq.png

Customer: replied 3 months ago.
Everything is connected properly
Expert:  airheatman replied 3 months ago.

Do you have 230 to 240 on both sides of contactor as shown above?

Customer: replied 3 months ago.
Expert:  airheatman replied 3 months ago.

OK so we have power in and out of contactor to compressor and motor but neither will come on and breaker does not trip?

Customer: replied 3 months ago.
That is correct
Expert:  airheatman replied 3 months ago.

OK if you are sure everything is wired properly, capacitor is reading within range but nothing come son the compressor and fa would have to be defective. It is not unusual to get a DOA capacitor, Have you checked it?

Customer: replied 3 months ago.
Capacitor not DOA
Expert:  airheatman replied 3 months ago.

Can you verify 230v between the fan wires ? And same with compressor (Common and RUN)?