Question about Honeywell Programmable Thermostat Heater

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Dellllllllllluxe programmable thermostat chronotherm plus iv

I cannot get power to thermostat. i have checked the breakers and the furnace doors. is there any other thing to check. i'm sooo cold. patti

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Does your thermostat have batteries. What is the brand of furnace and model # . Does the furnace have a pilot light or is it electronic ignition. if you need heat you can take thermostat of wall and take wires that are labeled r and w and wire nut them together to see if furnace comes on. Make sure you turn breaker off to furnace first before you take thermostat off the wall. If furnace comes on after you turn power back on after you connect those two wires together then you will probally need new thermostat. If not you have a problem with your furnace. If you have any questions after you try this feel free to ask any more questions.

Posted on Jan 16, 2009

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Home furnace comfortmaker blowing cold air

Home owner's manual? Troubleshooting section. Gas or electric?
If gas, pilot light may be out, or other gas controls. Are you sure you have gas supply? Do you have other Gas appliances so you can check? Furnace needs power for controls, fan and thermostat. Are you sure you have electric power to the furnace? Does the thermostat have a fan switch? If so turn it on and see if the fan turns on. If it does not turn on you may have a circut breaker poped. or some other reason power to the furnace is not working.

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Honeywell thermostat blows cold air on heat

Thermostats don't actually blow anything, the heating system might though. Check the breakers for your heat system, then call a heating specialist. They're really not that expensive.

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The display went blank on my honeywell t8600c thermostat. when the batteries were changed, the display shows the time and -AC. Nothing else functions

I believe this thermostat will display -ac if it loses power from the furnace or air handler. Your thermostat will operate on low voltage(same as your door bell) and constantly powers your thermostat. I would check your furnace breaker, and fuses to see if there is power to the equipment

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Sounds like The thermostat is stuck open, Keeping the water/coolant circulating too fast and not getting warm...

Mar 27, 2013 | 2000 Nissan Xterra

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It says that the cool program is running but no air is coming out of the vents

there are a few things to look at 1) Power is on at furnace and condenser
2) Switch sub base to fan on and see if you get air. If that works and if there is air great. If no air check the furnace to see if the filter is plugged and or if the cooling coil is frozen If all is clear try this. 3) Shut down main power either at breaker or switch to the furnace and wait about a minute or so then turn on breaker or switch 4) If this fails you could have a controller board problem at the furnace or blown fuse. Without knowing the type or age of your system its either a board or relay provided power is good

Jun 08, 2011 | Honeywell Programmable Thermostat Heater

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No power to the thermostat ?

your thermostat only requires 24 volts. If you are not getting 24 volts, you will have to go to the control panel of your furnace. On newer models, there is a small fuse on the circuit board of the furnace . It will be 3 or 5 amp. Check it first. Make sure you have power to the furnace also. If the blower access door is loose you will lose power to the furnace. These are the first things to check. Good luck.

Apr 21, 2011 | Goodman CKL60AR60 Air Conditioner

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I have a braeburn 3200 thermostat that has went blank on me yesterday. I have checked the fuse box, no tripped breaker, i have checked the switch on the furnace, its on, and there are no batteries. Im not...

If there are no batteries in the thermostat then the furnace was being used to power it. To make sure it is just a thermostat problem, you can jumper the power and heat wires that connect to the thermostat, usually red and white, or terminals R and W. If the furnace comes on, then you need a new thermostat. If that doesn't work, you have lost power at the furnace somehow. If the breakers are good, and the furnace switch is on, then you can have a bad door switch inside the furnace, a bad transformer in the furnace, or a bad circuit board if equipped. If there is a circuit board, they usually have fuses somewhere on them too that can blow. Just be sure to cut power off at the breakers before checking. Hope this helps and good luck!

Dec 11, 2010 | Honeywell Electronic Programmable...

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A/C and furnance won't turn on

Turn The Fan Switch at Thermostat to on, If nothing happens you need to check the fuse disconnect at
furnace if it is equipped with one, if not make sure
the breaker is not tripped.

If all of that is ok, make sure the blower door is secured, when it is secured it makes up a door switch which transfers all the power to the control
board of the furnace.

If you dont think its the blower door switch, remove the door and tape over the switch to simulate that it is closed. Check for 24 volts between R and C where
the thermostat wires go R is usually red and C is usually white. If you dont have 24volts at R and C
check to make sure that the little 3amp automotive
fuse is not blown, I think the fuse is purple and should easily be located on control board.

If the main fuse or breaker was blown or tripped, check to make sure the blower motor will turn by hand.

Jun 13, 2010 | Heating & Cooling

1 Answer

While lowering the thermostat the screen went blank. The a/c turned off and now nothing works. Please advise

You may have the furnace running the power to the thermostat. To check, you can see a terminal on the back of the thermostat that is marked ''C''. If it has a wire ran to that terminal, it usually means the furnace provides the power to the thermostat. If this is the case, you may have flipped a breaker or blew a fuse inside the furnace (depending on the model). You might try checking the breaker first since that is a common thing, then check the furnace and see if it has power, you might try flipping the switch ( if available) or flipping the breaker to reset it, it sometimes works depending on the problem. If it is a fuse, they are usually 4 amp fuses. The only other way to troubleshoot to see if it's the thermostat, you can take the Red wire and the Green wire off of the terminals on the back of the thermostat and carefully touch them together and see if the fan comes on, it's basically hard wiring the furnace fan motor to have power, if it doesn't come on, then the problem persist in the furnace. Hope this helps or at least sets you in the right direction. Good luck!

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Honeywell dial theromostat.

since you say it has a blank face it must be a digital thermostat. if the power is on to the furnace and the furnace door is on (door switch) and still does not give you a reading. You probably have a bad stat. if you are handy.... unhook the wires in the thermostat. jump the red and white wires together. the furnace should turn on. if it does the thermostat is bad. if it does not turn on its not the thermostat its the furnace

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