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I have a greenhouse Modine PDP modle heater that I cannot get the Pilot light to light at all . I have checked the LP gas supply to the heater and it is good. I have pushed the reset button as well an

The heater is 12 years old and the thermocoupler appears to be in working condition.

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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

  • 1 Answer

SOURCE: Unable To Keep Pilot Light Lit!

I have a Williams top vent gravity wall furnace (model 5009622) and I had the same problem. I had to take the cover off the furnace -- screw on top and two at the bottom (open the access door and there is one screw on each side) to get to the reset button for the vent safety shutoff system. On my furnace it's on the left side toward the top of the unit. I pressed the little red reset button and it's been working ever since. If your furnace is properly installed and doesn't have bird's nest in the chimney, it should work fine. Good luck!

Posted on Dec 06, 2007

  • 1 Answer

SOURCE: Pilot will not light

The Pilot indicator will appear to line up with the arrow on the base, and even push in as though allowing gas to flow, but if it is just 1mm out of alignment, no gas will flow. So the solution is to move the valve in the Pilot mode slightly in one direction or the other to see if/when gas flows.

Posted on Nov 07, 2008

  • 128 Answers

SOURCE: sta-rite lp heater wont start

Its the top. There is a membrane that controls the circuit board....the button pad is bad

Posted on Aug 30, 2009

Testimonial: "Thanks, I agree. After checking power supply all the way through to control board, placing a jumper from pins 9/8 and 9/7 on J6 I get lights on LED's"

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SOURCE: kozy world propane wall heater. The pilot light will work

Sounds like you have a common problem with infrared heaters. They are very dust sensitive and they will light and then go out when they are dusty. If you have already tried to blow it out at home you need to take the heater to your propane dealer who will take the heater apart and blow it out correctly. They will then hook it up to their gas line and make sure that the problem is fixed. I hope that you haven't blown up into the bottom of the heater where the gas line is connected. There is a diaphragm up in there and if you blow into it you risk messing it up to where it won't work at all.

Posted on Oct 19, 2009

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