Question about Honeywell Programmable Thermostat Heater

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RTH230B Thermostat I've been told that after I installed the thermostat that it did something to the transformer. Where is that located and how to fix it?

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The transformer may be installed remotely to the furnace or may be a part of the honeywell burner relay. if you connected the thing between the transformer secondary common and hot it will surely blow the transformer.

Posted on Feb 03, 2008

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My rth2300 honeywell thermostat says the heat is on but the heat is not on.why?


It could be the breaker is tripped or the blower is not getting power. Check your transformer to make sure you are getting 24 volts going to the fan relay sequencer and make sure you check your capacitor that is connected to the fan as well. sounds like a minor electrical hiccup. Also check your thermostat wires and pay close attention to anything marked w1 or w2 as these are the terminals that control the heating part of your system.

Feb 01, 2013 | Honeywell RTH230B 5-2 Day Programmable...

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My thermostat keeps blowing itself out


Electrical problem getting to hot ie burning out stat check transforme rvolts ?

Jan 24, 2013 | Heating & Cooling

1 Answer

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.

May 24, 2010 | Honeywell Electronic Programmable...

1 Answer

Honeywell RTH230B


This my situation exactly.  Changing from a 6 wire manual round Honeywell thermostat to a 5 wire Honeywell programable.  Is there a way to maintain all functions?

Sep 21, 2008 | Honeywell Programmable Thermostat Heater

1 Answer

Model RTH230B uses a lot of batteries


THIS TYPE has been deemed defective! changeout to a different type.

Sep 04, 2008 | Honeywell Programmable Thermostat Heater

1 Answer

Honeywell rth230b won't shut off heat


Sounds like a relay sticking. Possibly in the thermostat or possibly the furnace relay at the furnace. The next time it happens, unplug the thermostat from the wall. If the furnace still runs then it's the furnace relay.

Hope that helps...

Geno

Mar 07, 2008 | Honeywell Programmable Thermostat Heater

3 Answers

Honeywell RTH230B


Normally, you should have 5 color wires: W-White, Y-Yellow, G-Green, R-Red and C-Blue.

The Blue wire is a common from the transformer on older systems, which is probably hooked to RC terminal.

Try this: Remove the blue wire and jump the RC to RH with the red wire and you will be fine. Blue wire should not be needed with the new thermostat.

This should also be stated in the instruction manual.
Hope this helps.

Feb 03, 2008 | Honeywell Programmable Thermostat Heater

2 Answers

I can't program my thermstat


go to www.honeywell.com. There you will find a search tab. Type in the exact model number of your thermostat. You will be able to download the installation/owners manual.

Nov 29, 2007 | Honeywell Programmable Thermostat Heater

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