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Shut the heater gas off, cleaned all the dust and dirt from it, relit the pilot, thermostat clicks like it wants to start, no heat

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From hanging around this site i've read that the thermocouple needs a sanding to generate enough power to give feedback that the flame is working ok

Posted on Oct 22, 2013

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Posted on Jan 02, 2017

Buffalo12980
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SOURCE: Pilot light lit but no heat

the pilot's millivolt generator may be at fault.  if you have a meter that is capable of measuring a very small DC voltage, connect it up to the very end of the thermocouple and the copper cappillary. the thermocouple has a welded bead at the very end inside that generates a small DC voltage. Same principle of a J-K thermocouple. Iron constintan  - two dissimiller metals where joined together produce a voltage when heated.  the thermocouple actuates a millivolt electromagnet inside the valve to keep the valve pellet open.  no voltage there it won't actuate the electromagnet.

Posted on Oct 15, 2007

  • 41 Answers

SOURCE: yellow pilot on heater

Best Solution posted on May 06, 2008 4%20stars.png
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soleman13au
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Rating: 90%, 19 votes
Hi mitalee1
All it needs is a good blow out with compressed air. They tend to carbon up in the pilot light area. You will probably also find it is very dusty inside. Easiest way to clean the carbon out is to remove the hose at the heater and with compressed air blow through the fitting where you have removed the hose. Make sure you hold down the start button so the air can get through to the pilot light and jets. Don't connect the electricity for the fan when you do this. If you can get to the top of the pilot light it may help to give that a blow out too.
To clean it out internally you only need to remove the front panelling. Just follow the screw configurations *** you go. I asm not familiar with that type of heater so thats about the best I can do. Regards Bryan

Posted on May 07, 2008

  • 1 Answer

SOURCE: pro comm natural gas heater, pilot keeps going out

The problem is likely to be either the thermal-couple (easily replaced) or a clogged gas orrifice. The clogged orrifice would require a bit more know-how then the thermal-couple and with gas appliances it would be best to hire someone who knows what they are doing.

Posted on Mar 21, 2009

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