Furnace Fan Limit Control Switch Settings

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Furnace fan limit control switch settings.

Below we detail the functions and normal settings for five controls found inside this device. Is the he limit. My guess is 205f. How to check the furnace fan limit control switch wiring.

The switch is one of the easier devices and attachments on a furnace. A photo of a 1970 s era honeywell l4046t fan limit control installed on a gas furnace showing common wire connections on a gas furnace. Here is a complete guide to the fan limit switch settings manual fan override temperature settings for warm air heating furnaces heating furnace controls switches. The fan limit control switch on a furnace regulates when the blower will come on or shut off.

Range at the bottom. The second setting is the fan on setting this is commonly 120 130. Right now the fan limit switch has 3 temperature indicators settings visible. In many models it also has a built in safety control for the burner to shut off at higher temperatures if the burner s inner control malfunctions.

Furnace fan limit switch control. What ois a furnace limit switch. It is a round silver tin disc with a temp. And the high limit is 130f.

Westland michigan 48185 734 326 3900 888 828 8317. Technical hot and cold 38568 webb dr. This is generally 100 degrees f. The limit is set from the company from 170 will suffice.

Hello some people switch the settings a bit but the first setting is the off settting. The fan limit switch temperature settings shown on the dial sketch are discussed separately. Assure that the control has been installed and wired in accordance with the manufacturer s installation instructions using the following procedures. How to install adjust or repair the furnace fan control or furnace limit control.

As we explained above the furnace fan limit control turns the furnace blower on and off at the proper times.