Fan Limit Switch Temperature Settings

It should be located near the top of. A control which turns the blower fan on or off depending on the air temperature within the furnace. An adjustable fan limit controller typically is designed for furnaces operating at temperatures from 100 f to 250 f has a fan off lower limit that can be adjusted from 50 f to 200 f a fan on switch adjustable from 65 f to 215 f and a fan high limit stop set at 200 f.

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Open up the access panel on the furnace.

Fan limit switch temperature settings.

And the high limit is 130f. Slide the cover off the control switch. A temperature sensor within the furnace. A high limit setting which turns off the heat source or burner.

This switch may have to be fine tuned to keep the fan from coming on during summer and to keep the fan from short cycling during normal operation. A fan limit switch consists of the following components. My guess is 205f. It is a round silver tin disc with a temp.

An on off switch for the blower fan. What are the correct temperature settings for a fan limit switch. Range at the bottom. The the low limit is 80f.

Most slide off or unhook for easy access. The three settings from low to high are 80f. Is the he limit. Look for the fan limit control switch encased in a small rectangular box.

Jul 24 2007 10 06 am the limit switch would be set about 180 degrees this is the off temp the fan switch would be set to come on at 135 and go off at 100 to 105 degrees. How to set a fan limit control switch step 1.

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