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Wired a honeywell rth2300/rth/221 series and now my central air unit does not come on but the furnace blower does

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Check the main capicitor in the outside portion.

Posted on May 11, 2014

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Posted on Jan 02, 2017

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Amana model gmh95070


Don't need the blue wire is common for the ac condsor unit what t-stat is it honeywell 4000 6000 8000 or one of rth models there is many t-stats as far as you saying fan stayes on check the auto / on section of the t-stst main wirers are RH/R-power W-heating Y-coolin G-fan

Mar 14, 2014 | Goodman Heating & Cooling

1 Answer

Honeywell RTH2300 says Heat On, but furnace isn't running.


Your tstat is not the problem. I've not yet worked on an oil furnace. I'm way down south. But either way, if your tstat was calling for heat(heat on), and you pushed a reset at the furnace, more than likely that reset is a safety. OK to reset, but now what ever that safety is preventing from happening, has failed and can not be reset until repaired. The reset should be an automatically opening switch upon unsafe operation. And manually closed to "reset" the safety. That safety is connected to something that is not working properly. Hope this helps!

Mar 02, 2017 | Honeywell prgrammable thermostat RTH2300B

2 Answers

Carrier oil furnace model 58BMA155-20(FORCED HOT AIR)i had changed the blower motor & honeywell st9103a128 fan control board.now the blower motor won't shut off until the breaker is turned off.i...


You need to check the wiring to the limits and safety devices with are in a number of locations, make sure all connections are tight.The most common cause for the blower to run is the high limit device which is the one mounted above the burners on the flat metal panel with two wires.

Nov 03, 2011 | Carrier XHB123D X/Y Series Heat/Cool Air...

1 Answer

The temperature on my honeywell thermostat is set to 89 degrees and does not want to change no matter what. The model is RTH2300. Please help because the heat is really unbearable.


Just google RTH 2300 for the manual, check that the hold is not on, if it is push it to turn it off, if not read thru the manual. On most stats if the unoccupied set point are blocking the occupied set points run the unnocc. temp down and then set the occ. set points down. Good luck

Jun 30, 2011 | Heating & Cooling

1 Answer

The furnace part of my central air is wired to a seperate breaker but keeps tripping the breaker and making a spark in the breaker box.


Usually a Central Unit is wired seperate, the Air handler inside and the
Cooling unit outside. It appears that the breaker is bad, is it a Single Pole Breaker?

Another possibility is that the indoor blower motor might be bad.

Jan 10, 2010 | Heating & Cooling

1 Answer

No heat after installing honeywell thermostat H8110U


hook up the blue wire in the furnace cabinet where the blower section and the other thermostat wires are connected to the furnace. the thermostat you have uses a common wire from the thermostat to the furnace and this needs to be hooked up in the furnace otherwise you will have the problem you are having.

Dec 07, 2009 | Honeywell Electronic Programmable...

1 Answer

I just purchased a honewell RTH 221 thermostat. I


Typically the four thermostat wires are:

R = power (or common)
G= FAN
W = Heat
Y = Cool

Assuming that you have a normal electric or gas furnace and air conditioning, if the heat really is coming on, then just switch the position of the the Yellow and White wires.

Nov 02, 2009 | Honeywell Programmable Thermostat Heater

1 Answer

Honeywell RTH 221 Programmable Thermostat. Jumper missing


The proper way to do it would be to use a small piece of wire stripped at the ends. Then use a small amount fo solder on each end to connect RC to RH. Or use a small piece of solid(stiff) wire and strip the ends. The wrap the ends around the connector and crimp them to make contact. I would not use a paper clip. A paper clip is not designed to carry 24volt current and could melt.

Nov 02, 2009 | Honeywell Programmable Thermostat Heater

1 Answer

My honeywell humidifier is using water at 2 gallons an hour


Furnace mounted humidifiers "should" be wired so that they are only running when the furnace blower is on. When the furnace is off so should the humidifier. If it is wired proper, it is possible that you have a bad solenoid valve. It could be stuck in the on position. If it is bad these valves can be expensive. If your humidifier is newer, fix it. If it is old you are probably better off to just buy a whole new unit.
Good luck

Mar 23, 2009 | Honeywell HE365 Humidifier

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