Furnace Fan Limit Control Switch Settings

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.

Furnace fan limit control switch settings.

The fan limit switch temperature settings shown on the dial sketch are discussed separately. It is a round silver tin disc with a temp. My guess is 205f. The fan limit control switch on a furnace regulates when the blower will come on or shut off.

Assure that the control has been installed and wired in accordance with the manufacturer s installation instructions using the following procedures. As we explained above the furnace fan limit control turns the furnace blower on and off at the proper times. Is the he limit. The three settings from low to high are 80f.

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. What ois a furnace limit switch. How to install adjust or repair the furnace fan control or furnace limit control. Below we detail the functions and normal settings for five controls found inside this device.

Furnace fan limit switch control. Kozy king furnace 300 400 messickstove 856 452 aquastat for hydronic loop using wood boiler and oil honeywell furnace temperature fan limit switch control heating best fan in thestylishnomad com 13560 best fan thestylishnomad com 2019. This is generally 100 degrees f. Right now the fan limit switch has 3 temperature indicators settings visible.

The switch is one of the easier devices and attachments on a furnace. Westland michigan 48185 734 326 3900 888 828 8317. The limit is set from the company from 170 will suffice. How to check the furnace fan limit control switch wiring.

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. Hello some people switch the settings a bit but the first setting is the off settting. Technical hot and cold 38568 webb dr. The the low limit is 80f.

The second setting is the fan on setting this is commonly 120 130.