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I have a spc-40 All Pro heater. it lights fine but when i release to gas button after 1-2 min. the heater will not stay lit. it stayed lite once and when i moved the heater it went out and will not stay lit. i am lost on what to go with this.
The most common problem is the flame sensor located just behind the fire chamber, about two inches long in a round rubber boot with two wires. you can get one from mr. heater for about 3 bucks. the wires are a different color but all you have to do is splice them to your old wires. it doesn't matter how you connect them.
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Sounds like an old boiler. It is not on timer and has to be lit manually. Push in the gas button and hold and push the sprung ingnition button to greate spark. Continue to hold in gas button 1-2 mins and release. The pilot light should then stay on. The flame will have heated the sensor in the combustion chamber and the boiler thinks that there is a flame and will allow the main gas jets to light when demanded . If the flame does not stay on clean the sensor prongs with emery cloth but do wait until they are cooled. You have open up the combustion chamber for access
The 1-2 mins above varies
This sounds like a problem with your thermocouple.
Just
remove the end of the thermocouple from where is goes into the gas
valve and leave the end that goes into the flame in place.
Clean
the end of the thermocouple connect by scraping off just a little metal
from the end just about there the nut tightens the thermocouple into the
gas valve. After you have exposed some new metal do the same inside the
valve where the thermocouple seats into the gas valve. Use a small pic or similar item to scrape inside the gas valve to expose some new metal there also.
Now reassemble the thermocouple into the gas valve and see if the heater works.
Here is a link with some more instructions. http://www.msservice.net/ts/reseat_thermo-clean_pilot-ODS.htm
If this does not solve the problem you may need a new thermocouple and you can find that at www.desaparts.com
Hi, The thermocouple is bad and you will have to replace it... The thermocouple is the thing that sticks up in the flame to sense that the flame is on... if it goes bad the pilot flame will not stay lit when you release the button...
you need to replace the thermocouple at the burner tip it will be a copper line with a bulb in the flame tip with a copper tube leading back to the gas valve and it senses the flame and keeps the gas valve open
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