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New thermostat not starting compressor

I just installed a new programable hunter model 44110 thermostat and the fan will start but the compressor will not
the old thermostat was a carrier model hh01ad042 the only issue i had some question on was on the old carrier unit the red wire (R) was jumped to a terminal marked with the number (4)
all other conections were normal
green = G = fan
yellow = Y = compressor
white = W = heating

Do I leave the jumper in place on the new hunter unit, remove it, or something else?

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  • 85 Answers

With the jumper inplace does the compressor start? What about without? Unless you have more than one transformer you should leavethe jumper.

Posted on Dec 06, 2008

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Posted on Jan 02, 2017

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