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Fan wont turn on

Put thermostat on heat and it flashes for 5 mn then stops and has aux heat on it does not have this feature

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Try to check the fan relay, may be it's broken or the fan capacitor is broken.

Posted on Feb 23, 2008

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Trying to hook up Honeywell RTH6350 thermostat. When turned on cool out air blows out. We only have a green, red, yellow and white wire from the old unit. Are we missing some wires? we have a heat pump.


Your Thermostat should wire as Red to Rc/Rh (if Rc/Rh are not connected you need to put a jumper between them; White to W; Green to G; and Yellow to Y on your thermostat. These will be the only wire connections that you need to connect from the unit to the thermostat. However, if your thermostat is not battery operated and is programmable then you will have to run on wire form the transformer in the units C to the Bl on your thermostat.

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Justin

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Buzzing sound when aux heat comes on


Sounds like it could be a effiency function to warn you that the heat elements are on. Check your thermostat manual and see if you can turn this feature off. If this is not a feature then the thermostat may be wired wrong or something in the circuit may be trying to short out.

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Outside fan runs constantly Aux Heat only 50%


Let's start out by your statement that the fan would not run, then you changed the contactor, not it won't stop running.
I believe, based on your info, here's what you need to do. Kill power to the unit. The 2 wires bringing power to the outdoor unit should be on the top 2 terminals. The 2 fan wires should be on the bottom 2 terminals. This is providing that the contactor is mounted Vertical. The could be an outside chance that the unit has a short in it and you are getting voltage feedback somewhere.
Take another look.

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I have a reclaimer90 gas forced air furnace,the fan runs non stop


sounds like the High Limit has opened due to over heating. if your filters are dirty it may cause the unit to over heat and the High Limit saftey will turn off the gas and just run the fan till it cools and the safety should close. however the safety could have failed and stuck open , in that case the burner wont come on and the fan wont shut off. look for a flash code on the control board and thier should be a sticker somewhere that tells you what the # of blinks means.

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Hi and welcome to FixYa,

Initially, I am inclined to suspect 3 possibilities:
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  • dusty thermal sensor/switch for the fan (likely);
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1 Answer

Honeywell Thermostat


Make sure G from indoor unit goes to G on thermostat for fan continous fan, if that doesn't work and you have 24 volts to R and C then the t'stat is bad.
For 2nd stage heat or aux.heat, on the indoor unit you need to make sure the wire W2 from the indoor unit goes to W2 on t'stat.
You don't need any wires from W1on the indoor unit to W1 at the t'stat because with a York heat pump Y1 is the contactor which turns the compressor on and you will get 1st stage heat, and for cooling the t'stat will also bring on O which is the (reversing valve) or cooling changeover relay for the cooling mode.
C = common usually black wire
R = hot usually red wire
Y or Y1 = contactor
W1 = 1st stage heat not needed for heat pump
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O = Cooling changeover relay
B = Heating changeover relay
L = System monitor
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you can use a 5 wire heat pump thermostat.

Must be heatpump thermostat
red is 24 volt power
white is aux/emergency heat these usually will need to be jumped together
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yellow is compressor contactor
blue is reversing valve
you just don't have a common so some thermostats will not work.
get one with batteries

Dec 13, 2008 | Honeywell Programmable Thermostat Heater

1 Answer

Thermostat says ''Aux heat on'' and buzzes when we turn on heat


You most likely have a heat pump, the aux heat (usually electric) comes on anytime the room temperature is 4 degrees below the thermostat setting. Does the buzz go off when the aux heat lite goes out? If the aux heat does not shut off then the primary heater (heat pump) is not putting out enough heat to satisfy the thermostat. I need a little more info. Do you have a heat pump? Is it working?

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