![]() When your furnace begins to start, the sensor checks for the presence of fire. Defective flame sensorĭefective flame sensors are one of the most common causes of lockouts. ![]() Here are the most common lockout culprits explained. Most of the time, furnaces go into ignition lockout because of issues with flame sensors, igniters, or limit switches. Many homeowners send their furnace into a locked out state when they attempt to get it running several times in a row without success, unaware that the sensor has detected an unsafe condition. ![]() If your furnace is locked out, it will most likely remain in that state until it’s reset. This is known as an ignition lockout, a condition that can be caused by a number of different sensors found in your furnace. When a sensor detects an unsafe condition, the furnace controller will shut off the power and fuel to prevent hazards. Unfortunately, the furnace will remain in this state until you or your local Murrieta heating repair technician reset it manually. ![]() If any sensors detect an unsafe condition, the furnace shuts down to prevent safety hazards or damage to the unit. Modern furnaces are equipped with a number of safety sensors used to keep the proper functioning of the unit in check. Is your furnace continually shutting down? Has it stopped responding entirely after several attempts to turn it on? If so, your furnace may be in an ignition lockout and must be reset. ![]()
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