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Have 0630545 ventless gas heater. was working fine. with pounding nails outside pilot went out won't relight. tried cleaning it without taking anything apart, no help. can't find manual online

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I would say you have blocked the pilot needs to be cleaned out try sucking it out with a shop vac .

Posted on Dec 07, 2016

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Posted on Jan 02, 2017

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Why does my blue flame ventless propane heater go out for no reason?


Did the gas man use a manometer when the gas pressure was adjusted up? The three basic types are 1. round needle guage capable of measuring approximately 30" water column pressure, 2. U-tube manometer filled with a clear or red glycol, and 3. digital guage.

It sounds like the gas pressure is a few inches water column too high which could cause the pilot flame to actually lift off the thermocouple tip causing flame failure after the gas valve opens. More is not necessarily better when it comes to gas pressure. Normal propane manifold pressure is around 10.5" w.c. with maximum inlet pressure of 14" w.c. This pressure can be accurately measured with one of the above listed manometers by tapping into the manifold downstream of the gas valve or in the pressure tap on the downstream side of the gas valve. Most normal 100% redundant gas controls have an individual pilot adjusting screw in the valve itself for adjusting the pilot size and pressure independent of manifold pressure.

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Try to take pilot assembly apart and clean real good. This will work most of the time. If it does not work for you, you will need to replace the gas valve. It's expensive but I'm about positive that cleaning it will fix it. Gas burns dirty and after a couple seasons a scale builds up that causes this problem. It's pretty common and nothing to worry about after it's cleaned. Good luck.

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