Question about Dayton (4LX41) Heater
Pilot light went out and now I can not get it to stay lit. Solid blue flame when holding down the pilot light button but when it is released flame goes out. Start up instructions say to hold for a minute. Held it down for over two and still no luck. Do not know which part to replace.
Clean the pliot light tube with a Q-Tip and alcohol. Clean 2 inches deep. This will increase the pilot light flame and it will heat up the thermocoupler so it will stay lit.
Posted on Dec 06, 2008
Replace the thermocouple. It is cheap and relatively easy to replace.
Posted on Nov 02, 2007
If you\'ve engulfed the last 3/4 to 1" of the tip of the thermocouple and it is glowing red and it still \'drops out\' when the button is released, the vast majority of times it is the thermocouple at fault. VERY RARELY it is the safety \'holding coil\' internal of the gas valve that receives the millivolts generated by the thermocouple to remain open....but it does happen.
You\'ll need a 3/8" wrench for the thermocouple connection into the gas valve and possibly a 7/16" endwrench for the pilot assembly end....sometimes they are only held in with a clip and will slip out easily from the bottom. Access to the pilot assembly on the unit heater you\'ve described is by removing two 5/16" captive screws on either side of the bottom front which allows the whole bottom of the heater to hinge downward exposing all of the ribbon burners and the pilot assembly.
If your pilot flame was weak and not keeping the tip of the thermocouple red hot, now is the time to remove the entire pilot assembly from the gas valve to the burner mount and blow out with an air compressor. The orifices inside the pilot are so tiny, you cannot generate enough pressure blowing with your lips to do any serious removal of dust, lint or foreign debris that may be partiallty restricting the pilot gas flow. If you feel the need to disassemble the pilot assembly totally, you\'ll need a 1/2" wrench to hold the assembly solid while undoing the aluminum pilot tubing with the 7/17" wrench. When disassembled, tap the back end of the assembly and the tiny pilot orifice SHOULD drop out unless it is the larger type that actually screws into the assembly. Resist the urge to use a needle or pin to ream out the openings, you will render it useless and a new assembly will have to be purchased. Use the air compressor or keyboard cleaner if no compressed air is available.
Posted on Jan 10, 2015
I am having the same problem. Everthing that I have read sugests replacing the Thermocouple.
Posted on Dec 30, 2007
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