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Question

The thermostat I just insstalled does not turn on the AC, warm air comes out when the AC is on. Model RTH6400. Red wire is connected to R, black to Y, green to G, white to W. Old thermostat was diconected when I removed it so I could not map the wires.

Submitted: 141 days and 6 hours ago.
Category: HVAC
Value: $15
Status: CLOSED
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Posted by Mark Henley 141 days and 6 hours ago.

Answer

Hi,

 

Is there an RC terminal on the new stat ? Make sure you have a jumper between the R and RC terminal, let me know.

 

Thanks

 

Mark

141 days and 6 hours ago.

Reply

Yes there is an RC and the jumper is installed

Accepted Answer

HI,

 

Switch the black and white wires and see what happens.Let me know,

 

Thanks

 

Mark

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Expert: Mark Henley
Pos. Feedback: 99.2 %
Accepts: 
Answered: 7/4/2009

Journeyman Technician

UA Journeyman Pipefitter , HVAC, Refrigeration, DDC controls. 26 years.Commercial & residential

141 days and 5 hours ago.

Reply

Thanks, its working now.

Posted by Mark Henley 141 days and 5 hours ago.

Info Request

Hi,

 

Great,

 

Thanks

 

Mark

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