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Vanguard wall heater stays lit for 30 mins to a

Vanguard wall heater stays lit for 30 mins to a couple of hours and then goes out hvac came out serviced it an it ran great for approximately 6 hours and is now doing exactly as I stated regarding the initial problem prior to calling hvac company, it's Thanksgiving Day and I couldn't get any hvac company out yesterday just found fixya I'm in Oklahoma thank you for any suggestions

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Is there a thermostat fitted? If so make sure this is set high enough for the appliance to work. Very simple solution but my mum had a plumber come out to her whole heating system not working all because the thermostat was set too low.

Posted on Nov 28, 2013

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Posted on Jan 02, 2017

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hotuna
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SOURCE: Vanguard heater

Usually the pilot goes out because of a faulty flame sensor or wire connection.

Posted on Nov 30, 2007

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SOURCE: 3.5 TON GSH14 GOODMAN WITH TXV

If it cuts out on heating cycle only, it has to be the metering device at the outside unit, which i think is a txv for that model. Take the outside unit apart, run it in heat and watch the txv and see how it responds, also check the bulb n make sure its secure....

Posted on Oct 20, 2008

  • 1 Answer

SOURCE: won't stay lit

here is a site that sells parts http://www.thoseheaterguys.com/1933204.html here is a manual and parts list http://www.rentrain.com/library_files/400.pdf . hope this helps.

Posted on Jan 14, 2009

  • 2 Answers

SOURCE: Pilot light won't stay lit

Look for dust and lint. Look for them in places where gas should be freely flowing. I had a similar problem with an Empire Corcho wall-mounted propane ceramic catalyst heater. First it was the pilot light, then the #2 ceramic mantle. After horsing around with the gas lines and pressure regulators and trying to re-aim the pilot, it all turned out to be dust and lint in the gas passages. A little dust bunny in the brass pilot tube gave me a pilot light the shape and color of a banana. One puff of compressed air, and I got back my razor-sharp pilot. And some dust in the chimney of the #2 burner kept it burning blue/yellow and blistering paint off the upper surfaces of the heater. A bit of cleaning with a shop-vac put that right. "Passive" heaters are very much prone to this sort of problem because they rely on convection currents (i.e. LOW velocity) to get the job done. Convection currents are notorious dust collectors, as in COBWEB CITY.

Posted on Feb 28, 2009

billyvangogh
  • 108 Answers

SOURCE: Wall furnace shuts off after about 10-20 mins

sounds like its not venting properly...it likely is shutting off on a "Spill switch" or "Vent safety switch"....check the vent/chimney first off.....also the pilot could be dirty..,..a lazy pilot tends to blow out easily....pilot should be blue and sharp,,,big enough to fully envelope the thermocouple
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Posted on Nov 01, 2009

Testimonial: "I checked the pilot light and it's clean. I will have to check the chimney next week but thanks!"

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I have a Vanguard wall heater model VN18TB that will not stay lit and the electric igniter won't work


The ignitor is battery operated. Remove the button and replace the AAA battery wit the (+) going INTO the body (-) against the button.

The heater has a pilot with an Oxygen Depletion Sensing (ODS) safety shutoff system. The ODS/pilot is a required feature for vent-free room heaters. The ODS/pilot shuts off the heater if there is not enough fresh air. If the heater will not stay lit with plenty of fresh air available - this may be faulting. Likewise, a mispositioned thermocouple will not sense a flame and fail, too.


A link to the heater manual is below:
https://www.allpartsinc.com/mmALLPARTS/Others/VN18B.PDF

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1 Answer

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There should be a troubleshooting guide in the manual for the unit. If you do not have a manual you can obtain one at www.desatech.com , then go to "Wall Heaters" then click your model number. I know the thermocouple, gas regulator, and gas valve all share common symptons of what you're describing. For more parts check out Master Parts, as they carry a lot of the Vangaurd parts. ( 1.800.446.1446). I hope this helps!

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