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Infrared heater multi-plaque ignition - Whoosh!/flutter/stink/no light

I have a 3-plaque propane heater similar to the 5-plaque MN100HPA. Don't remember the mfgr, may be Procom. Manual heat control. First plaque lights fine. ~50% of the time the other plaques won't light properly. When valve is advanced to light 2nd and 3rd plaques, I get a big Whoosh! and the flame only flutters at the top of the plaque, while the unit releases a lot of raw propane. Takes many retries to get proper ignition and uniform heat. Doesn't seem to have excess pressure, and works fine after proper ignition with any number of plaques burning.

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3 Suggested Answers

  • 188 Answers

SOURCE: pro com plaques breaking down

You may want to try Master Parts, they may have the plaques. The problem with replacing the plaques is that they can be expenise to replace. Sometimes its the same price just to replace the total unit.

Posted on Jul 08, 2009

  • 2 Answers

SOURCE: Infrared Heater - flaming thru plaque

I had this problem. From using the center brick most of the time, lots of dust bunnies build up in the gas chimney behind the brick.
Tie 2 pipe cleaners together with a small perpendicular circle at the top and carefully remove the dust bit by bit by twirling the cleaner.
The brick should fire like new if it is carefully cleaned out.

Posted on Dec 14, 2009

  • 381 Answers

SOURCE: Sometimes when my gas plaque infrared gas space

It sounds like a delayed ignition- and YES!-- that could be dangerous if something flammable was nearby, and no one was around to make sure the fire did not start something int he room on fire!

Trouble shooting delayed ignition:

Does this heater use a glowing ignitor to ight?

Or a standing pilot?

Or a spark?

I suspect that whatever is supposed to light the gas burner, is not in the path of the first gas release, (when the gas valve Opens) and so it takes a bit for the gas to build up, and finally get around to the source of ignition-- and then WHOOSH!!-- all that extra gas ignites!

Can you see the ignitor as it goes thru its first firing cycle-- what do you notice about the ignitor?

~~~~~~~~~~~~~~~~~~~~~~~

Something to consider:

What prevents it from filing the room with gas, before it ignites!

Sounds mighty dangerous to me!

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Let us know what happens, and what you find-

Mack B

Posted on Jan 23, 2011

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I have a GloWarm propane/lp gas space heater. Can I use bottled propane tanks?


no you can't, and aren't you worried about carbon monoxide poisoning? Where does the burnt air go?

GloWarm Heaters - ventfree infrared heaters
GloWarm Infrared heaters are residential gas space heaters that are ventfree,
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GloWarm Plaque Infrared heaters direct heat from radiant plaques that
"warm like the sun."

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After installing my kozy world heater and lit the pilot the heater came on. all three plaques. this happened while the knob was still in the pilot position. the heater wont shut off.


I actually have three of these and what I found was the gas valve was stuck in the open position you may need to replace it or possibly remove it and try to clean it of any residue but be very careful if you don't know exactly what your doing then you need to get a pro. Remember that your dealing with propane and it could ignite and cause serious damage to you and your home. Please be very careful and you might want to call the manufacturer and talk to them about it. Because it is a gas appliance they have a responsibility to you if anything should happen then they may be liable.

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Sometimes when my gas plaque infrared gas space heater comes on a ball of loud flame bursts out in front of one of the plaques instead of lighting up the plaque. What causes this only occasionally? How can...


It sounds like a delayed ignition- and YES!-- that could be dangerous if something flammable was nearby, and no one was around to make sure the fire did not start something int he room on fire!

Trouble shooting delayed ignition:

Does this heater use a glowing ignitor to ight?

Or a standing pilot?

Or a spark?

I suspect that whatever is supposed to light the gas burner, is not in the path of the first gas release, (when the gas valve Opens) and so it takes a bit for the gas to build up, and finally get around to the source of ignition-- and then WHOOSH!!-- all that extra gas ignites!

Can you see the ignitor as it goes thru its first firing cycle-- what do you notice about the ignitor?

~~~~~~~~~~~~~~~~~~~~~~~

Something to consider:

What prevents it from filing the room with gas, before it ignites!

Sounds mighty dangerous to me!

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Let us know what happens, and what you find-

Mack B

Jan 23, 2011 | Procom 10K BTU, Vent Free, 2 Plaque...

1 Answer

Delayed ignition of a Ruud high efficiency upflow 90 plus propane


It sounds like the first thing to do is have burners and pilot cleaned and adjusted so ignitor and pilot flame is close to main burner ignition rail.

The "whoosh" is due to delayed ignition because the pilot flame does not come in contact with main gas.

One more thing that should be tested is the gas pressure and combustable air mixture to be sure it is correct.

It is always best to have a qualified technician do this for you, In many areas the gas supplier with check and safety test this for you.

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Pro com plaques breaking down


You may want to try Master Parts, they may have the plaques. The problem with replacing the plaques is that they can be expenise to replace. Sometimes its the same price just to replace the total unit.

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It sounds like the orifice is missing or is the wrong type (LP) on the back burner.

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What you are experiencing is common if the plaques are either out of alignment or the burner is dirty. I know you said you cleaned it with low pressure air, but you need at least 120 PS. of air to clean the burner and plaques as per the owners manual.

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