replacing old thermostat and I have to many wires.

Old 01-13-07, 03:37 PM
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replacing old thermostat and I have to many wires.

Hi there

We were lucky enough to get a Lowes gift card for Christmas so today we went and bought a programmable thermostat.
My wife read somewhere about how they can save us money on our heating / air con bills.

Our old one is from when the house was first built I think (so at least 20 years old)..

new one is a Hunter 44550

old thermostat seems to be no name brand..

Old Wiring

letter designated on old thermostat followed by wire color..

c = blue

G = green

Y= yellow

R = red

W2 = brown (or it may be black)

W1 = white

O = orange

The new thermostat has spaces with the letters..



RC - there is a jumper wire between RH and RC which it says are for 2,3,4 wire systems..




We have read that as the new one is battery powered we should cover up the C=Blue wire as that isn't needed anymore..

The thing that is throwing us is that we have a W1 and a W2 wire but only one space on the new thermostat for W..

We have tried their help line but it is closed till Tuesday..

Any help appreciated, I don't really want to damage something major by messing about.

Old 01-13-07, 04:11 PM
Join Date: Aug 2006
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C terminal

It is always a good idea to use the C terminal; it keeps the stat working when the battery goes dead. Otherwise, the stat stops working. I'm surprised the instructions advised otherwise.

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