Furnace Fan Thermostat Switch

The premature overheating trips the switch to shut off the furnace.

Furnace fan thermostat switch.

4 4 out of 5 stars 97. If it doesn t then you probably have loose or burnt wires in behind the relay or you may need a new fan relay or circuit board. Problems within the contractors circuit board gas valve or even the thermostat. The fan blower should come on.

The bimetallic thermostat has modes for heating and cooling and fan positions for on off and automatic. Get it as soon as thu oct 1. There s a problem in your thermostat wiring. Your furnace fan limit switch is set to manual override the fan limit switch is faulty and needs to be replaced.

Make sure that your furnace switch is on the furnace blower compartment door is on and secure. If the furnace continually runs yet no heat comes through the system you may have a problem with the fan limit switch. Wiring the fan only option is not difficult as long as the thermostat model includes this option and involves a single wire and a little patience. Your fan limit switch is located directly under your furnace hood and controls when your furnace blower turns on and off.

1 16 of 965 results for furnace fan switch honeywell l4064b2236 combination fan and limit furnace control. Finally the heat anticipator is an electrical resistance wire mounted on a center disc connected to the bimetallic coil. Move the lever on the thermostat to the on position. Unfortunately you ll need a professional to fix those last 2 problems.

But before you call in a pro check to see if your fan limit switch is set correctly. Step 1 read the instructions that came with the thermostat and the furnace. You ll need to identify if your home is fitted with 1 stage 2 stage direct line voltage 24mv or zone heating and cooling to determine which thermostat will be compatible. It is adjustable to allow fine tuning of when the thermostat turns the furnace blower on and off.

Senasys snap disc thermostat switch circuit on at 80 f and off at 65 f large flange part number 2511f002 029. Most new thermostat units are compatible with heat pump thermostats baseboard heater thermostats furnace thermostats and boiler thermostats. These may cause the fan limit switch to stop working properly. American volt dual radiator electric fan adjustable thermostat relay wiring switch kit car truck standard 4 3 out of 5 stars 5.

4 5 out of 5 stars 165. It is not programmable. Bayite temperature controller btc201 pre wired digital outlet thermostat 2 stage heating and cooling mode 110v 240v 10a.