Additionally, the propane … 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. This is a butane unit, if I'm correct. These furnaces skip … If your gas-burning heating unit isn’t working, the first thing you probably do is check the pilot light, right? Facts: Greenhouse is 20’ x 60’ or 1,200 square feet, 12’ high. Patio Heater Won't Stay Lit One common issue that patio heater owners face is keeping their patio heater lit. Mr. heater mh540t propane heater won't stay lit. 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 heater fires and goes out as soon as the start button is released. The typical cause for this is that the pilot light flame has become too far away from the thermocouple. I have a propane heater in my patio that will not stay on. What happens when the pilot light is lit, but the heat still won’t turn on? Gas fireplace won’t stay lit, but the pilot light does. If you have a direct ignition furnace, you won’t have a pilot light. 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. Have tried three brand-new un-vented propane heaters. 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 tried contacting Rigid without success. If the pilot won't stay lit, the problem is usually related to the thermocouple, a heat-sensitive electrode that signals the gas valve to stay open when the pilot is on. Keeps shutting off. Below are some reasons why your burner won’t stay lit. Other potential causes are not having enough gas … If the pilot light remains lit, but the gas fireplace doesn’t, it likely indicates an issue with your thermopile. With this, it has a temperature sensor and if this sensor is … This is another relatively small piece of your fireplace that converts heat to electricity, ultimately opening up the gas valve when you turn on … My propane heater will not stay lit. Cleaned it thoroughly, tried a different propane tank and it still won't stay lit. The gas valve sends gas to the main burner(s), which is lit by the pilot light. Another reason that your patio heater won't stay lit also has to do with the thermocouple. Chances are, it’s a problem with your burner. When it turns itself off, I can't re-light it. Propane heater won't stay 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. 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