High limit temperature switch

Simply put, it senses the temperature of the furnace and tells the blower fan to turn on and off at the appropriate times. It also can shut down the furnace . Limit switch used primarily on select 50- 80btu LP heaters. This product offers very rapid response time and very high temperature sensing.

Turn power off to the furnace (a must in any component replacement).

Use an ohmmeter to measure resistance across the switch , which, if the temperature is below the setpoint, should be zero.

Full line of temperature controls, temperature switches , thermal switches , and thermostat products manufactured in the United States by Selco Products.

Overview of the furnace limit switch - Duration: 3:42. How the high temp limits in electric furnaces work. It is designed for industrial and commercial applications that require high temperature protection. For on-off temperature control for ducts, tanks, heating and refrigeration units, greenhouses, animal confinement buildings and other applications where electronic accuracy in addition to remote sensing is desire Honeywell Remote Temperature Controllers are the answer.

Normally closed SPST switch opens on temperature rise to . A tripped switch cuts the power BEFORE the fuse to stop the function of the heater as well as the hot tub pump. In older systems, this may only cut power to the heater when tripped. Onan will tell you the fan thermostat switch is no longer made, but Senasys still makes custom temperature snap disc thermostats or limit switches for many. When troubleshooting the high limit switch , it is important to realize that either something is wrong with your hot tub causing it to overheat or other circumstances have caused your high limit to trip without the temperature getting that hot. Replacement safety switches for HVAC units.

Damper switch , primary limit switch for Goodman, Armstrong and Trane HVAC products. The thermostat could be set too high. In either case, check your hot water temp at the tap, try to figure . Safety thermostats (manual reset) - with an adjustable set-point, fi xed differential and manual reset, which provides high limit cut-out on boilers etc. ST-FRE Capillary Frost Thermostat.

Thermostat, Limit , Automatic Reset, Switch Action Open on Rise, SPDT, Temp. The function of your furnace limit switch is to tell the fan when to turn off and on depending on the temperature in the home. Consult your instruction manual before resetting your furnace's limit switch. One arm controls the furnace's low temperatures and the other arm controls the high temperatures.

High Limit For Hot Water Sensor.