It worked fine since purchasing it in November and just stopped running. A flame sensor lets your furnace know that the pilot was successfully lit. This is a butane unit, if I'm correct. The heater fires and goes out as soon as the start button is released. Gas fireplace won’t stay lit, but the pilot light does. If your gas-burning heating unit isn’t working, the first thing you probably do is check the pilot light, right? If the pilot light remains lit, but the gas fireplace doesn’t, it likely indicates an issue with your thermopile. Other potential causes are not having enough gas … When it turns itself off, I can't re-light it. Chances are, it’s a problem with your burner. Thus, the thermocouple will turn off the patio heater as it tricks the gas value in to thinking that the pilot light is out. Propane heater won't stay lit.? My propane heater will not stay lit. When the pilot won't light, you can often trace the problem to a lack of propane, either because the tank is empty or a valve is closed. I have a propane heater in my patio that will not stay on. The pilot will come on and stay on until I turn the knob from pilot to … With this, it has a temperature sensor and if this sensor is … Propane heaters have sensitive controls to regulate gas flow and keep a room comfortable, but when one malfunctions, the fault is seldom with those controls, but with the gas or ignition system. If you have a direct ignition furnace, you won’t have a pilot light. I have tried contacting Rigid without success. These furnaces skip … Sometimes the thermocouple gets coated with carbon from the propane.Sometimes using a small tooth file and lightly sanding the thermocouple will help to remove the carbon build up. The gas valve sends gas to the main burner(s), which is lit by the pilot light. Patio Heater Won't Stay Lit One common issue that patio heater owners face is keeping their patio heater lit. ... My Mr. heater will not stay lit I have to hold the button down for it to stay lit if I release the button the flame goes out. What happens when the pilot light is lit, but the heat still won’t turn on? Below are some reasons why your burner won’t stay lit. Have tried three brand-new un-vented propane heaters. I just bought a new Reddy heater 55k BTU propane salamander for my garage. The typical cause for this is that the pilot light flame has become too far away from the thermocouple. This is another relatively small piece of your fireplace that converts heat to electricity, ultimately opening up the gas valve when you turn on … Facts: Greenhouse is 20’ x 60’ or 1,200 square feet, 12’ high. Mr. heater mh540t propane heater won't stay lit. 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