Question about Honeywell TH3210D1004 PRO 3000 Non-Programmable Thermostat, Heat Pump Systems

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My honeywell thermostat does not shut fan off when temperature is reached

Only way to shut fan from running constantly after it reaches set temperature is to put it down 1 degree. Example, its set on 72. It reaches 72 and stays on. I put it down to 71 then air stops flowing and fan shuts off.

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Posted on Jan 02, 2017

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  • 5 Answers

SOURCE: I HAVE PROBLEMS WITH MY

t87 usually are about 5 degrees off. sometimes more because of dirt and dust.get a digital

Posted on Aug 28, 2008

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SOURCE: I have an old honeywell thermostat, non

If your thermostat has a mercury bulb it has to be level to be accurate. Check and make sure it is level. If the thermostat is level as a heating tech. i would next check the amp. draw through the thermostat so I could make sure the heat anticipator is set properly. This may be more than a home owner wants to tackle.

Posted on Nov 04, 2009

SOURCE: My honeywell Thermostat reaches the heating temp.

I want to give a simple explanation before I go any further. On the heating side of a unit even though tthe temp has satisfied the thermostat, the fan will run until it cools down the plenum where the air flows from the air handler. There is a bimetal switch called a fan limit that operates the blower when the plenum reaches the temp set on the fan limit switch. Now if your fan keeps running even after the plenum chamber has cooled down, then you could have a fan limit switch that is stuck in the run position and must be replaced in order to correct the problem.

Posted on Dec 08, 2010

heatman101
  • 43501 Answers

SOURCE: We have a digital Honeywell

Hi, Most all of the Honeywell t-stats have a temperature adjustment feature...also check the the cycle rate is the right one for your heating system... You will find all of this info in the manual for your t-stat...

Here is a tip that tells you how to get a manual for most any Honeywell productonline...

Manual Honeywell How to Find Honeywell Manuals

heatman101

Posted on Dec 08, 2010

  • 119 Answers

SOURCE: I had a Honeywell Thermostat

Is this a new hvac system? A new furnace can work differently than your old one. Does it shut off after a minute or two or continue to run? If it continues to run then call that professional back and let him fix it. If it shuts down after a minute or two then it is a feature of the new thermostat to squeeze all of the cool it can from the a/c coil and ductwork.Some of them have settings that you can adjust for blower delay on and off, read the manual that came with the t-stat and see if it does.

Posted on Jun 17, 2011

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