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Heat only thermostat Honeywell CT-30A temp settings wrong on and off on scale

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

  • 579 Answers

SOURCE: honeywell round mercury thermostat - heat not coming on

If you tip the mercury switch so that it makes contact and the furnace doesn't start, it isn't the t-stat. Check the connections, then start checking the furnace.
In any case, ditch the mercury t-stat (recycle it properly) and get a new programmable one if at all posible. It will pay for itself many times over by turning your heat down in the middle of the night and back up by morning.

Posted on Feb 10, 2008

  • 518 Answers

SOURCE: honeywell rth230b won't shut off heat

Sounds like a relay sticking. Possibly in the thermostat or possibly the furnace relay at the furnace. The next time it happens, unplug the thermostat from the wall. If the furnace still runs then it's the furnace relay.

Hope that helps...

Geno

Posted on Mar 07, 2008

Accurate Joe
  • 61 Answers

SOURCE: heat pump auxiliary heat does not turn on

Turn up your outside thermostat in the outside unit.
You should have about 3 degrees difference in one stage to the next. So I would change the thermosat with one that has three stages of heat.

Posted on Nov 30, 2008

heatman101
  • 43501 Answers

SOURCE: Honeywell RTH2310 thermostat temp variance

Hi,
Yes you can change that by change the number of cycles per hour that your t-stat looks from for youe furnace. Lower the cycles per hour number and it will increase the range.

You can see how to do it here

http://dl.owneriq.net/3/39359643-dfda-451d-bb81-828eecddd9fc.pdf

I hope that this will help you to solve your problem!

Thanks for using Fixya!!

Heatman101

Posted on Dec 12, 2009

  • 1 Answer

SOURCE: Honeywell CM921 Showing room temp at -24 degrees, How do I reset?

honeywell cm921 problem with red light flashing tenp not controling boiler can any one hel

Posted on Dec 15, 2009

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3 Answers

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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It's either because the thermo sensor is faulty or the location is wrong. Try setting the temp one degree above room temp and see if that works, if it does it's a location issue. The thermo should be close to the centre of the house, not near an outlet or the RA vent & not in a breezeway or other heatsink, at approx 1.5m above floor level.

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How do I set my thermostat for my furnace? My thermostat wont come on appropriately. I think I pushed wrong buttons and can't get the heat to stay on. Would like to cancel settings and be able to set...


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I have installed a honeywell programable thermostat that has been working well until the outdoor temp reached higher temps. Now it continuously blows like a fan and does not cool the home.


Sounds like the t-stat is wired wrong or if you bought a honeywell from home depot didn't set up correctely. You could also have other issues, like low on freon, dirty filters. You might need to call a Service company to take a look at it.

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This sounds to me like your thermostat is bad and will need replaced! this is not normal~
Please rate responce,
Thank You!

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Heat pump auxiliary heat does not turn on


Turn up your outside thermostat in the outside unit.
You should have about 3 degrees difference in one stage to the next. So I would change the thermosat with one that has three stages of heat.

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Thermostate temperature setting wrong


Are you saying that the temperature over-shoots it's setting by 5 degrees? If so and if the thermostat has an inticipator device in it you can adjust it. After removing the cover on the thermostat, look for a little brass triangle on the lower right hand side. There will be a scale with numbers on it and they are very hard to see. This device heats up prior to shutting off the thermostat so it will not over-shoot by more than a few degrees. Move the brass triangle either up or down and let the heater cycle a few times. If the temperature swing gets worse, go the other way next time.

If the thermostat is not heat inticipated, there will be a small "Dip" switch where you can adjust to a specific degree of under-shoot.

Visit the Honeywell website and you can pull up the installation/owners manual for your model. www.honeywell.com

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