This is a propane heater that won't stay lit after you let go of the pilot knob, could be a thermal coupling, but I cannot find parts. Any suggestions would be great.Dyna glo 100,000 btu shop heater, its only 1 year old
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More than likely the thermal couple is defective. The thermal couple is a safety device that shuts the gas off if the pilot goes out. If it is defective the pilot light will not stay lit. The thermal couple is the device that the small copper line goes to. It is mounted beside the pilot flame and the flame much touch the TC for it to work. If the flame is not touching the TC bend it until it is in the flame. If it is touching the TC then replace it.
There are basically three things that can go wrong with the Warm Morning . Sensor shut off. There is a sensor button on
the back of the unit with a wire going from it to the
thermocouple. This sensor turns the heater off if the flue is blocked,
however it will also shut the heater off if the wire contacts are
dirty, or if the sensor has gone bad.
You can test this by bypassing the sensor. Disconnect the two wires
from the sensor and reconnect them directly together. If the pilot stays on,
your problem is here. Try cleaning the wire contacts first. Pilot orifice. If the pilot flame is small and doesnt look healthy, the pilot orifice may need cleaning. The hole is very small and can get dirty. Disconnect the silver tube and clean with electrical parts cleaner. Never try to clean the hole with an object like a pin, you may damage it. You may have to slide out the burner unit to get at the silver tube. (Always shut off gas before disconnecting lines and after you
reassemble, spray joints with soapywater and look for small bubbles
which may indicate a gas leak. Dont use parts cleaner around an open flame.)
Thermocouple can go bad but this is not as common as the first two problems.
The pilot must encompass the thermocouple "bulb" in order for the thermocouple to generate enough current to keep the pilot valve on. You must also hold the red button down for a long enough period to get the thermocouple hot. If the pilot is not large enough, it could be due to a clog in the pilot orifice at the pilot itself. Sometimes a couple of passes over the end of it with fine steel wool is all it takes to clear it.
Hope this helps. Feel free to share what you found. Thanks.
Do you have the serial number or the manufacture date? There are some design changes and I would need to know the year of manufacture to assist accurately. Usually it is a relay or the thermocouple connection that will affect the unit staying lit.
I called Nexgrill technical support at 1-800-913-8999. They are sending me a new thermo couple to keep the valve open when ignited - so the patio heater will stay on. I needed to give them the serial number (inside the propane tank door) and fax them a copy of the receipt.