Question about Honeywell Electronic Programmable Heat/Cool Thermostat - CT3300A100 Heater

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Only have two wires on old thermostat,where do i hook them up on a rth2310 thermostat

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More information would help but I believe that you are trying to hook up a programmable thermostat to your old heating system which is what? Oil forced air, heat pump, gas? Give me more info and I think that I can help you.

hardrocko

Posted on Feb 07, 2010

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Posted on Jan 02, 2017

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I bought a Honeywell programmable thermostat RTH2310 to replace my 10 year old Honeywell thermostat. My old thermostat is a 4 wire system but also has a jumper from Y to 1. New system does not tell me what...


It depends on the type of thermostat you have.
Do you have a 4 wire or 5 wire T'stat?
The red jumper wire was for a 5 wire t'stat with 1 transformer, the red jumper actually should have been from R to 1.
So you need to trace the wires back to the furnace and make sure they go to the locations identified below.
if you have a 4 wire t'stat then you don't need that jumper, if you have a 5 wire t'stat then you do need that jumper but it should go from Rh to Rc.
4 Wire Termostat
R = Red One Side of 24 volt Transformer
G = Green Blower
Y = Yellow Cool
W = White Heat
5 Wire Thermostat
with one transformer for both units
Rc One Side of 24 volt Transformer
Rh Jumper Rc to Rh
G = Green Blower
Y = Yellow Cool
W = White Heat
t'stat?

Nov 14, 2009 | Honeywell Programmable Thermostat Heater

2 Answers

Wiring new RTH2310 DIY Honeywell


sounds like you've got bear wires touching at the new tstat

Sep 18, 2009 | Honeywell Focus 6300B 5-2 Days...

1 Answer

Hooking up wires. where?


Connect one wire to R or Rh.
Connect the other wire to W.
This should allow you to use the thermostat with battery power.

Nov 14, 2008 | Honeywell Focus 6300B 5-2 Days...

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