Facts: Greenhouse is 20’ x 60’ or 1,200 square feet, 12’ high. 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. I also have one of these heaters. I have tried contacting Rigid without success. Thus, the thermocouple will turn off the patio heater as it tricks the gas value in to thinking that the pilot light is out. Chances are, it’s a problem with your burner. Additionally, the propane … The pilot light is lit by an electronic spark. Cleaned it thoroughly, tried a different propane tank and it still won't stay lit. My propane heater will not stay lit. If your gas-burning heating unit isn’t working, the first thing you probably do is check the pilot light, right? It worked fine since purchasing it in November and just stopped running. (two different models) Symptoms: They light and burn, but about midnight are found to be out—perhaps after working about four hours. The pilot will come on and stay on until I turn the knob from pilot to … Patio Heater Won't Stay Lit One common issue that patio heater owners face is keeping their patio heater lit. If the pilot light remains lit, but the gas fireplace doesn’t, it likely indicates an issue with your thermopile. 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. When it turns itself off, I can't re-light it. Other potential causes are not having enough gas … These furnaces skip … Below are some reasons why your burner won’t stay lit. The typical cause for this is that the pilot light flame has become too far away from the thermocouple. Mr. heater mh540t propane heater won't stay lit. A flame sensor lets your furnace know that the pilot was successfully 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. With this, it has a temperature sensor and if this sensor is … This is a butane unit, if I'm correct. The instructions say to hold the fuel valve button down for 30 seconds at the initial start up to activate the automatic control, then release and adjust the temperature accordingly. The gas valve sends gas to the main burner(s), which is lit by the pilot light. Gas fireplace won’t stay lit, but the pilot light does. I have a propane heater in my patio that will not stay on. The heater fires and goes out as soon as the start button is released. What happens when the pilot light is lit, but the heat still won’t turn on? If you have a direct ignition furnace, you won’t have a pilot light. Keeps shutting off. I just bought a new Reddy heater 55k BTU propane salamander for my garage. 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