Electronic Ignition Furnace Thermocouple

How to tell if an ignitor on a gas furnace is working.

Electronic ignition furnace thermocouple.

If no flame is present the sensor stops or prevents the flow of gas from the gas valve thus preventing the dangerous situation of. One can still purchase a gas furnace or water heater with the old standing pilot ignition systems these systems have been proven reliable and safe over time. Most gas furnaces use either a flame sensor or a thermocouple often referred to as a thermal coupler. If you have a newer furnace or one with an afue rating above 80 it most likely has an electronic ignition system.

These newer furnaces do not use a pilot. Electronic ignition vs standing pilot modern gas furnaces use electronic ignition systems to light the burners in modern furnaces. The temperature limiting switch is a safety feature that turns off the burner when the furnace becomes too hot clogged air filters and problems with the switch itself can cause the igniter to. Intermittent pilot ignition.

There are two basic types of electronic ignition systems. Faulty temperature limiting switch. Before the advent of modern electronic ignition furnaces most gas furnaces featured a small standing pilot light that burned all the time. Gas furnaces now come with an igniter that works electronically to light the gas and heat the home.

Since there are many different types of gas furnaces it is difficult to cover every single possible gas furnace problem that can occur with a gas furnace in one article. Gas systems that are eligible for an upgrade from standing pilot to electronic ignition covers btu ratings up to 270 000. Electronic ignition gas furnace problems troubleshooting gas furnaces are a prevalent form of heat for homes and businesses and occasionally a gas furnace needs to be repaired because of a problem with the gas furnace. Electronic ignition systems aren t designed to last for the lifetime of your furnace.

One type of electronic ignition is an intermittent pilot. Have a pro inspect your igniter to ensure it s in working order. In such furnaces the standing pilot works together as a team with the thermocouple the electronic device that senses if the pilot flame is hot enough to ignite natural gas or propane fuel to the burner to control gas flow and the ignition of your. This system uses a pilot flame but the pilot lights only when there s a call for heat from the thermostat the furnace s electronic control board activates an electric igniter that uses a.

Honeywell produces an electronic ignition retrofit kit that is ideal for residential and light commercial gas furnace systems. Both are safety devices that sense the presence of a flame and control the flow of gas to the appliance accordingly.