Question about Honeywell CT3500 5-1-1 Day Electronic Programmable Thermostat Heater
Need to make sure of wire connections (controls a heatpump):
CT3500A (R-RC, O, W-Y, G)
CT3100C (E, Aux, Y, G, O, L, R, C)
Here is what I believe it should be:
R-RC to R, O to O, W-Y to Aux-Y, G to G
I don't know whether the E of the CT3100C should be connected to the Aux-Y.
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Posted on Jan 02, 2017
The thermostat is a low voltage circuit (24 volts) most of the newer heating systems have a fuse for the low voltage controls. If you are having to re-set the high voltage circuit breaker, then you have something else wrong. When does the breaker trip? while its running or after it shuts off?
Posted on Jan 03, 2008
did you mark which terminals you removed the wires from on the old stat? If not you will need to look on the furnace and see what letters they are connected to .. then connect to the same on the thermostat.
Posted on Mar 08, 2008
You have a heat pump. You need a thermostat for "Heat pump with Electric back-up heat". Make sure the 'stat has either an "aux" (auxilliary heat) or an "E"(Emergency heat) terminal. The wiring instructions will be provided with the thermostat.
Posted on Dec 16, 2008
I don't know if this will be helpful or not, but I just installed a new Honeywell and the Honeywell customer service guy helped me get the wires done correctly. The number is 800-468-1502.
Posted on Jan 05, 2009
red goes to RC and RH, White goes to W, Green goes to G and Blue goes to Y. iam assuming on the old tstat that Red whent to R White went to W Green went to G and Blue went to Y
Posted on Sep 20, 2009
Testimonial: "Thanks! Worked out great!"
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