Question about Honeywell Programmable Thermostat Heater
Honeywell thermostat TH6110D1021. Blower comes on when heat is called for and furnace ignites 10 seconds later. Call for heat should turn on burner motor, ignition in 10 sec. then blower in 75 sec. is the way it should run. How to set thermostat to get blower to come on after the 75 seconds instead of before ignition. Have checked system type 1 as 0 and 3 as 0.
Hi, You are right, fan is on a time delay in the heating cycle, and after burners fire that is when this delay comes into play. You have a preset factory temperature that determines the cycle on time for the fan, and the off time after the burners shut down also. This will not be in the thermostat, but in the fan/limit control the is mounted on the face of the furnace, with a probe inserted into the fire box.Depending on how old or new this unit is, will depend on the type control you have.It may be just a high limit switch, or the 1st I mentioned.If so, It rotates in the burner as the temperature rises, to turn the fan on and off.Disconnect power, remove cover, and 2 screws.Slowly remove the control and gently clean the probe. Turn the dial if this one has it and you will be able to hear it click. This click is contacts closing to start fan operation.Reinsert and try again. If problem continues, you will have to replace it.They do tend to stick closed/on, in the heat cycle from time to time and a cleaning sometimes will solve this problem. Not knowing how old this furnace is and type, make it difficult to give you a correct diagnosis, so check this fan control as I have explained, and if your system is of a different type, please let me no so I can correct this problem. Sincerely,
Posted on Dec 11, 2009
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Posted on Jan 02, 2017
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