Tip & How-To about Heating & Cooling

Repair your infra red heater thermocouple,do not buy one

The most common problem,for a infra red heater is the thermocouple.Not always,but if you look at the thermocouple,and it is no longer in the flame of the pilot lite,then it is the problem.The thermocouple has to be in the flame of the thermocouple,so ,to do that,you have to fabricate an extension,so that it will be in the flame of the thermocouple.I have found that a piece of tubing,such as steel brake line,works the best,use a tubing cutter,and cut a piece off the end of the steel brake line tubing.Figure out ,about how long it would have to be,to reach the flame of the pilot lite,and cut it,then just slide it over the top of the thermocouple,on the tip.The size tubing that you will need is 1/4 in .Any,and I mean any,auto parts store will have this,for about$ 2.50 or $3.00,get the shortest piece they have,most likely a foot.This tubing will heat up,therefore,transferring the heat ,to the thermocouple tip.There,you have done it,all by your self,and saved about$ 65.00.Labor,and parts.And the time involved waiting for someone to fix it.It is perfectly safe.So get to it america,fix it your self.

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I have a Mr Heater infra red propane wall heater. My problem is it turns itself off (pilot light) after running for an hour or two. I have no problem getting it turned back on but for some reason it d

Your pilot flame should be blue with a small yellow tip, and it should cover the thermocouple (a small rod in front of the pilot light). If the flame is too small and doesn't cover the thermocouple, it may be adjusted too low, or you have low gas pressure or you have a leak in your gas line coming in to the heater. If the flame looks like a lazy yellow flame, you are probably not getting enough air to the flame. Check that your air openings around the pilot are not clogged up. If the flame looks like a waving blue flame then you probably have excessive draft at the pilot. If the pilot flame looks good and covers the thermocouple, then the thermocouple might be bad. Best of luck. I hope I have helped.

Nov 23, 2013 | Heating & Cooling

1 Answer

heater will not stay on, pilot light won't stay on,model VH3000E

Depending on the age of your heater, from what you described, it sounds as if the Thermocouple needs to be replaced. because it's an Infrared Heater rather than just a Blue Flame model. I would recommend, that unless you are very handy with tools and gas heating appliances, not to undertake the repair yourself. The Thermocouple itself is not an expensive part at all ($10.00 to $15.00). So having a professional repair it is the safest way to go. Because, during the repair he/she can also clean the interior of the unit and check or test for any of problems.

Keep in mind, DESA International who manufactured the Vanguard Heaters is no longer in business. But, some parts (like the Thermocouple) are still available.

It's always best to have your heater cleaned and service at least once a year. Normally, in the Fall, before you fire it up for the season.

Feb 03, 2011 | Vanguard International Infra Red - Large...

1 Answer

vanguard wall heater pilot will light but when to turn on heat it goes out. Thermocoupler??

This is a very good possibility and depending upon the year they may call this part a flame generator. So ask for both when purchasing. Before you run out and purchase this take five minutes and try this, I use steel wool or light grit sand paper and clean up the bulb end of the thermocouple then place it top center of the flame as this is the hottest area of the flame, now with a small wrench check to see that it is tight in the gas valve. Now try lighting the pilot and then the furnace. Some times a simple cleaning and tightening can cure this problem. If not now you can go and purchase a new one.

Dec 27, 2010 | Vanguard International Infra Red - Medium...

1 Answer

is it ok to move the Thermal Couple closer to the Pilot Light the wall unit was not staying lit so i moved it right in front of the flame and now its working fine

Yes it is okay... I have often done just that. The thermocouple just needs to be in the flame when it is on and in case the pilot goes out it shuts down the gas valve.
The heat/cool cycles often move the metal around a bit causing the thermocouple to come out of the flame. It is best if the flame is just hitting the tip of the thermocaouple rater than down on the middle somewhere. That will destroy the thermocouple rapidly.

I hope that this will help you to solve your problem!

Thanks for using Fixya!!


Dec 17, 2009 | Vanguard International Infra Red - Large...

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