Question about Holmes Heater. 22.6 in. 1500-Watts Quartz Tower Heater HQH341-HD

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Heater won't stay on

Goes off after about 10 minutes

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Toro porta heater only stays lit for 5 or 10 minutes then the heat goes out but the fan stays running. Re-light it and it does the same thing.


The fan will continue to run after the flame goes out to prevent the element from overheating from residual heat. It should stop after a minute or two, when the element is cooled down.

It could be a venting problem. Make sure the vents are clean. When it's not lit, air gets into it. When you light it, it slowly uses what air it has and it starves for oxygen.

It could be a misadjusted thermostat and it's turning off before you think it should. Try setting it higher and see if it runs a bit longer. My thermostat on my house furnace runs 10 degrees higher than it should, so I just keep it 10 degrees lower than it says.

Jan 24, 2015 | Heating & Cooling

1 Answer

Heater won t stay lit


check gas pressure sounds like running out of gas meter might be too small

Jun 23, 2013 | Hayward Pool & Spa

1 Answer

Pool heater won't heat water


How big a pool? You normally will not notice a temperature rise immediately. On average, swimming pools will see a one degree rise in temperature every 45 - 90 minutes.

Jan 22, 2013 | Jandy Laars LX Pool Heater / 400,000 BTU /...

1 Answer

Greenhouse Heater pilot light will not stay lit


replace the thermocouple. it is a small copper tube that screws into the gas valve and goes to the pilot assembly. a good haedware store that sells heaters will have one. they come in various lengths 18"-48".

Nov 30, 2009 | Heating & Cooling

1 Answer

Pilots lites , holds ok for minutes,but once move


Hello KJGreen, It sounds, based on your description, as though the thermocouple is faulty and should be replaced. If the pilot light stays lit and you've left it on for several minutes before turning the knob on to light the log set, then that indicates that the thermocouple is bad.

The thermocouple is a safety device (heat sensor) designed to stop the flow of gas to the burner in the event the gas flame goes out and the pilot goes out. The sensor will only allow the gas valve to open once it has reached the preset temperature.

To confirm that the thermocouple is defective, I would light the pilot light and allow it to remain lit for up to 10 minutes before I attempted to turn on the log burner. If, after 10 minutes, the log burner still won't stay lit, then you know that the thermocouple needs to be replaced. Otherwise, the burner should light, since after 10 minutes, the sensor should be hot enough to signal the gas valve to open.

If you are going to have this replaced, please make sure you use only an approved supplier, since an incorrect replacement part could cause an unwelcome malfunction of the gas log burner. Safety should be primary when dealing with open flame burners.

Hope you find this Very Helpful and best regards!

Nov 23, 2009 | Vanguard International Infra Red - Large...

1 Answer

My mr heater mh9b won't stay lit. The pilot flame starts acting wierd and making noise after ten to fifteen minutes of being lit and then goes out completely. It can be re-lit but goes out again in a...


my mr heater mh9b won't stay lit. The pilot flame starts acting wierd and making noise after ten to fifteen minutes of being lit and then goes out completely. It can be re-lit but goes out again in a bit. Any suggestions?

Nov 17, 2009 | Mr. Heater MH9B Ceramic Utility

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