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. An on off switch for the blower fan.

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My guess is 205f.

Fan limit switch temperature settings.

What are the correct temperature settings for a fan limit switch. The three settings from low to high are 80f. Range at the bottom. It should be located near the top of.

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. Is the he limit. Most slide off or unhook for easy access. How to set a fan limit control switch step 1.

The the low limit is 80f. It is a round silver tin disc with a temp. A high limit setting which turns off the heat source or burner. A temperature sensor within the furnace.

And the high limit is 130f. 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. 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. Slide the cover off the control switch.

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