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airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 8327
Experience:  Furnace, A/C and heat pump specialist.
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Jerry, last winter I switched my old trane weathertron for

Customer Question

Hi jerry, last winter I switched my old trane weathertron for a honeywell rh7500d and at the time I only checked if the heat was working (which it did) but now that it's summer I've realized the ac isn't kicking on it only does the fan. Some more reference I have a trane xl1200 outdoor unit (that when switched on clicks but nothing happens)
Submitted: 2 years ago.
Category: HVAC
Expert:  airheatman replied 2 years ago.
Hello. My name is ***** ***** I'll do my best to help. Let's get started and see what we can do.Tell me the folowing1.Model on thermostat2.Model on indoor unit3.Model on outdoor unit4. What wires you have to what terminals on thermostat.5. Do you have a volt meter for troublshooting?
Customer: replied 2 years ago.

1. Honeywell rth7500d 2. Trane bwv736a100e1 3. Trane xl1200 4. Blue=c green=g yellow=y orange=o/b red=rc/r White=aux wires brown and black are taped off 5. Yes

Expert:  airheatman replied 2 years ago.
Lets turn thermostat to COOL> (May have a 5 minute delay.If so COOL may flash on thermostat). Once COOL is solid on thermostat Then go to outdoor unit. There locate the Blue wire from C and the yellow wire coming from Y and see if we get 24 volts AC between those wires.
Customer: replied 2 years ago.

I am getting 27volts

Expert:  airheatman replied 2 years ago.
OK next check at the contactor for the 27v at coil and 240 into contacor: