Question about Honeywell Programmable Thermostat Heater

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The transformer on my central AC/heater (luxaire model # A236A344T LH) keeps going out. There are 4 settings on the wall. Cool, off, heat and EM. Heat. The setting switches to EM. Heat each time the transformer goes out. I noticed this the first time it went out 2 weeks ago and thought nothing of it. I replaced the transformer last week. The unit ran fine for 5 days. It went out again today and the setting was on EM Heat again.

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My ac/heater is producing a burnt oader, what could it be??

Posted on Mar 02, 2010

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You might have some thermostat wires that are touching meaning the insulation has been broke off and getting a direct short. Check the wiring going to the outside unit and replace any wire that is in bad shape. let me know okay. Ken

Posted on Dec 11, 2009

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How do I set my thermostat so that it doesn't keep going off and leaving me with no hot water .I have a Honeywell digital thermostat.


The problem is not your thermostat. It is the person who told you that your AC would be your sole source of hot water. The purpose of heat recovery is to ASSIST with hot water production and reduce the current used by your water heater. The only time your AC heats your water is when it is working to cool (or if it's a heat pump, cool and heat) your home. Turn your water heater back on and let your AC help keep the water hot. It's not supposed to do it alone.

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Central ac/ heater (electric)...The heater quit working in the mid of the night, only cool air is exiting the vents. Everything else seems normal except the air is not warm anymore. We need warm air,...


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Hiiiii..... I have samsung Thermostat AC, But i dont know how to use the warmer / heater for the same. I dont know about the model number but its one of the old AC written thermostat. Now help me out how...


Symbolsin remote: To get proper cold air set temp 23 degree and mode"cool". To get heat set temp 30 degree and mode in "Heat"
Now symbols:
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2. Rain drop- Dry mode
3. Snow flake-Cool mode
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Luxaire AC unit control works but the ac unit will not turn on


Sounds like it could be your transformer. See if you can locate it. It should be in the air handler indoors. Check the voltage going to the transformer and check the output of the transformer. You should have around 24 vac on the output of the transformer. If you don't have voltage on the output make sure you have it on the input (120vac). If you don't have it on the input you need to find out why. If you have it on the input but don't have an output then your transformer is likely gone bad. Let me know what you find.

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1 Answer

How do you wire a honeywell round mechanical thermostat


What are you trying to wire up?
Typical Thermostat Wiring for 4 or 5 wire Heat/Cool Thermostat (not heat pumps)
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
5 Wire Thermostat
With 2 transformers one for indoor unit
And one for outdoor unit
Rc = Red One Side of (outside) 24 volt (outside transformer)
G = Green Blower (outside transformer)
Y = Yellow Cool (outside transformer)
Rh = Blue One side of (inside) 24 volt (inside transformer)
W = White Heat (inside transformer)
COOLING ONLY Thermostat
R = Red One Side of 24 volt Transformer
G = Green Blower
Y = Yellow Cool
HEATING ONLY
R or Rh One Side of 24 volt Transformer
W = White Heat

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1 Answer

I have a coleman Evcon model AH16-0 . I am


Typical Thermostat Wiring for 4 or 5 wire Heat/Cool Thermostat (not heat pumps)
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
5 Wire Thermostat
With 2 transformers one for indoor unit
And one for outdoor unit
Rc = Red One Side of (outside) 24 volt (outside transformer)
G = Green Blower (outside transformer)
Y = Yellow Cool (outside transformer)
Rh = Blue One side of (inside) 24 volt (inside transformer)
W = White Heat (inside transformer)
COOLING ONLY Thermostat
R = Red One Side of 24 volt Transformer
G = Green Blower
Y = Yellow Cool
HEATING ONLY
R or Rh One Side of 24 volt Transformer
W = White Heat

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1 Answer

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If you have
R to transformer
G to fan relay
Y to contactor in outdoor unit
W to Gas valve
You have the thermostat wired right.
Depending on the T'stat B could be the common side of the transformer or 2nd stage heat.
W2 terminal are for 2nd stage heat
You need to put the thermostat on cool and lower the setting to bring on the cooling. Then go outside and see if you have power to the outdoor unit and 24 volts to the contactor coil.

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Ho to turn on central AC unit? (Ruud High Efficiency)



This is typical wiring for a 4 wire thermostat

R = Red One Side of 24 volt Transformer
G = Green Blower relay
Y = Yellow Cool Condensing unit
W = White Heat Furnace

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