Fan Limit Switch Temperature Settings

Open up the access panel on 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. A high limit setting which turns off the heat source or burner.

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An on off switch for the blower fan.

Fan limit switch temperature settings.

Most slide off or unhook for easy access. Range at the bottom. Is the he limit. And the high limit is 130f.

A fan limit switch consists of the following components. A control which turns the blower fan on or off depending on the air temperature within the furnace. What are the correct temperature settings for a fan limit switch. The the low limit is 80f.

It is a round silver tin disc with a temp. The three settings from low to high are 80f. 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. Look for the fan limit control switch encased in a small rectangular box.

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. My guess is 205f. Slide the cover off the control switch. How to set a fan limit control switch step 1.

A temperature sensor within the furnace. It should be located near the top of.

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