Question about Honeywell Programmable Thermostat Heater

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We are in the process of replacing my old Honeywell Thermostat with a new Honeywell RTH6450/RTH6350 and the old Thermostat has White, Blue, Red, Green wires. And on the back of the old thermostat there is a red jumper wire between Yellow wire and a #1 terminal. The new thermostat has Y2, W2, G, W, (Not used), Y, R, RC. There is a jumper between the R and the RC on the new thermostat. So my question to you is do we remove the Jumper between the R and RC on the new thermostat when we connect the red wire to the new thermostat's red terminal.

Posted by Anonymous on

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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  • 96 Answers

SOURCE: Upgrading Thermostat

Looks like your system is a heatpump system and that t-stat will not run a heatpump , you need a t-stat for 2heat and 1 cool systems

Posted on Feb 01, 2009

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heatman101
  • 43501 Answers

SOURCE: Wiring problem?

Hi,
Yes to everything!!
You have it figured out!!
Just make SURE that the blue unused wire cannot touch any of the other wires, it will wreck your transformer in a split second.!

I hope that this will help you to solve your problem!

Thanks for using Fixya!!

Heatman101

Posted on Nov 25, 2009

  • 207 Answers

SOURCE: Replacing thermostat what to do with single red wirew/bridge?

yes u leave the bridge intact and just put ur red wire to r or rc and usually they say rh and rc that is for a 2 transformer system which obviously u dont have so leave the wire intact jumped and hook ur red wire up yellow is ur ac wire white is ur heat wire and green is ur fan wire and red is ur 24 volt hot wire all a tstat does is jump that red wire to white for heat green for fan or yellow for ac but make sure ur power to ur unit is off before u change wires or u risk touching wires together and burning up transformer

Posted on Feb 24, 2010

  • 587 Answers

SOURCE: Need wiring diagram for Honeywell RCT8100

The old thermostat has a second stage heat which is W2. The new one doesn't have second stage heat.
The wiring your describing on the old thermostat is telling me you have a heat pump with second stage heat and the new thermostat is for air conditioning only. You will need to get a thermostat for a heat pump.

Posted on Apr 02, 2010

  • 674 Answers

SOURCE: Honeywell RTH230B cooling problems...

I printed out the instructions for your thermostat. It looks like you should have the following.

There should be jumper wire between Rh & Rc

Red wire to Rh or Rc whichever is easier since there is a jumper. This is the hot wire and all the thermostat does is connect to route it to the components needed for heating or cooling.

Blue wire, tape it up and don't use it. There is no spot on this thermostat for it. It is only used on thermostats that are powered by the transformer.

White wire to W. Powers the heat relay

Yellow wire to Y. Powers the cooling contactor

Green wire to G. Powers the indoor fan relay

There is a black jumper on the back of the face plate. Look at section 2.4 Setting J2 Jumper in the installation instructions. Make sure you have it in the right position for what you have. If you don't have them just google them.

Hope this helps.

Posted on May 24, 2010

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