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RoyF's avatar
RoyF
Explorer
Oct 24, 2018

Furnace blower stops briefly then comes back on.

My furnace blower (in 2008 Hitchhiker II) will run for a few minutes, then the blower stops briefly (for one or two seconds), then it starts up again. This will happen several times while the furnace ...
Sam_Spade's avatar
Sam_Spade
Explorer
Oct 25, 2018
Old-Biscuit wrote:

Furnace controls would not cause t-stat to go click/click etc


NO but a defective Tstat that is turning the flame off and on might also then cause the fan to go off and on as the temperature in the heat exchanger rises and falls.

The fan runs because of a thermocouple on the heat exchanger closing when the heat gets high enough......and then opening when it cools after the flame goes off.

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