Question about Honeywell Programmable Thermostat Heater

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Furnace kicks on every 15 mins

I have a Honeywell round manual t-stat and my furnace kicks on ,runs 5 mins, kicks off and comes back on again in about 10 mins. Is there a control on the t-stat that I can regulate. The furnace is gas forced air and is in a cold attic.

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  • HANK MCNEIL May 11, 2010

    yes, there is an antisipator adjustment in the tstat. What brand and model furnace do you have?

  • dwkcool May 11, 2010

    on the t-stat cross the red and white wire if the furnace runs see how long if it does the same thing it is in the furnace

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Fuanace may be oversized and is short cycling it heats up house to fast it is better when they run longer

Posted on Oct 04, 2009

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HI it could just be your thermosat try cleaning out could be dusty or try repacing it

Posted on Feb 02, 2010

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Older style thermostats have a heat anticipator, which may be set incorrectly. The purpose of the heat anticipator "lie" to the thermostat, taking care of overshoot and lag. The heat anticipator should be set to the amperage listed on your gas valve

Posted on Jun 18, 2009

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1 Answer

My honeywell thermostat is asking for heat but the furnace won't turn on.


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Our Honeywell programmable thermostat is close to 20 years old. Within the past week or so I have notice that while the program shows the heat should be at 68 degrees, the thermostat is reading as low as...


Good Morning, and yes you said it. Anytime a stat doesn't come on when it is set for a call for heat or cooling, the sensor on the subbase of the stat has lost its ability to sense the correct temperature. I have seen mechanical stats last as long as 25 plus years, but that's truly amazing for a digital stat to last that long. Yes, replace the thermostat. I don't know what kind of system you have, but if its a gas furnace with an a/c, the wiring will look like this. You will have terminals marked R, Red, for the 24 volt hot wire, G, Green, Y, Yellow, and W, White for heat. Going back to the red wire, it should have RC and RH on it. There will be a normally red wire connecting the 2 terminals.The Red wire coming in can connect to either one, as they are all together. The new stat will come with the new Red jumper wire attached. So, if you do have a gas heater, this is very easy to install. The only terminals you will need to use are RH to RC for the incoming red, Y, G, and W for heat. Y is for cool, and G is for fan. Very easy. Now if you have a heat-pump, they have many more terminals and can be a problem wiring them. If you have gas, forget the heat pump. I wont confuse you by going there. If it is a heat-pump, contact me in the comment box to let me know, and I can help you there also. Get a new stat at Home Depot, Lowe's Hardware, or O.S. Hardware. You want a 5 day, 2 day programmable Heating and cooling thermostat, 24 volts.It will have everything you need. See if it takes batteries for the display, they may not come with those, it will say on the box. Turn off your power to heater, so you won't short out the new one.They come in 2 sections, first the stat that just snaps on, and the subbase that is screwed to the wall. It will have the wiring terminals on it. Remove a couple of screws and loosen wires and remove. Be sure you write down how the wires go in case they used different colors, you never know. You will be all set. Store the manual in a safe place for future use. I wish you the best.
Shastalaker7
A/C, Heating, & Refrigeration Contractor.
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Happy Holidays to you and family!

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Sounds as though another problem is showing up. Verify T-stat is sending the red 24volts (alt current) through the White wire. This can be done at the t-stat or the furnace whichever is easier to access. At t-stat your meter will show 24volts from red to any wire that the t-stat is not jumping to. So if you put on lead on Red and other on White and 24 shows up the t-stat is not connecting that and the furnace will (NOT) turn on heat. If you get 24 on Y or G but nothing on White then the t-stat is (Good) and the furnace in not kicking on.
To diagnose furnace look for flashing light on board. count flashes and read furnace diagram for info. Furnace diagnosis will take some patience and observation of what happens when. Problems can be Airflow, or parts. It takes some watching. I've found tools jammed in vent stacks, blocked (dirty) evaporators and failing sensors or relays. All causing the units to start but not stay lit.

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The manual is available on www.manualnguide.com

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With new digital thermostat furnace runs every 10 min.


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