Question about Honeywell Programmable Thermostat Heater

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My pilot light is on but there is no heat in the heaters

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Sounds like your thermocouple is fowled and is not allowing your heater to go to the next step which is opening your gas valve. take fine grit sandpaper and clean it off. if that doesn't work then replace it all together.

Posted on Jan 24, 2010

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1 Answer

Pilot light problems


Could be the bulb of the safety thermocouple is not being heated by the pilot light or the thermocouple is faulty.

Jan 22, 2016 | Heating & Cooling

1 Answer

Reliance 606 natural gas water heater - model #640YORT - water does not stay hot. pilot has to be clicked to heat and then u can use hot water til tank empty and it will not continue to heat water.


If I understand correctly, the pilot light is not staying lit.
You light the pilot and water in the tank reaches temperature.
Once hot water is gone, then pilot light has to be lit again.

Gas pressure is good, and gas is flowing.
Thermostat is working at high end because it cuts off heating.
Vent is working because tank heats up.
Air intake is working.

Gas control thermostat might not be reading low temperature. Replace gas control valve.
Pilot tube might be dirty. Clean burner parts and combustion chamber, and air intake, and vent.
Backdraft might be blowing out pilot. Check for constant updraft by running water heater 5 minutes, and then light match under vent hood and see if smoke goes up.
Very hot air can put out pilot, especially when water heater located in attic. Add ventilation.
Improper vent might have water dripping back down into combustion chamber and putting out pilot light and rusting out the parts. Inspect for rusted parts and water.
http://waterheatertimer.org/How-to-install-gas-water-heater.html#troubleshoot
http://waterheatertimer.org/pdf/Pilot-light-will-not-stay-lit.pdf

Aug 09, 2011 | Reliance Natural Gas Water Heater Control

1 Answer

On my patio heater the pilot light will light but goes out as soon as I release it, even after holding it down a long time. I can't get it to stay on to light the heater.


Check that the pilot light is directed at the thermocouple, a copper 'tube' that heats up when the pilot light is lit. You should be able to see a copper coloured small tube that the pilot light is directed at - if the pilot flame is not heating that tube then the main burner will not light.

If the thermocouple is being heated correctly, then it could be a fault with the thermocouple itself (can be replaced) or the gas valve.

If the pilot flame is not heating the end of the thermocouple you should be able to adjust its position so that the pilot flame is directed at it more accurately

Jan 18, 2011 | Rta International Patio Heater

1 Answer

No Hot Water


Well, let's start the trouble shooting process with trying to get the pilot lit...
Have you removed the cover at the bottom of the heater?-- Can you see an pilot light inside?

If not, Can you try lighting the pilot-- and noticing how the pilot flam heats the little ThermoCouple (TC)?
Note: In order for gas to flow thru the main control valve, the pilot light has to be heating the TC-- to generate a voltage, that in turn allows the main gas valve to open.
Do you need help in getting the pilot light lit?-- do you understand the need to hold down the start button, until the TC gets heated up?

Let us know what you find

Mack B

Jan 16, 2011 | Rheem 50 Gallon FVR NATGAS Water Heater...

1 Answer

Pilot after a few minutes of operation flutters and slowly goes out. lil Buddy Heater


The thermocouple is bad or not aligned properly. It is the metal bar in front of the pilot light. This bar senses the heat put off by the pilot light. If it does not get hot it will not allow the gas to flow. You either need to align it so that it is in front of the pilot light and receives enough heat to allow the gas valve to operate or possibly the thermocouple has gone bad and needs replacing.

Nov 25, 2010 | Mr. Heater Mr Heater Portable Buddy...

2 Answers

Pilot lights but main burner dose not light when turned on


possibly a fowled thermocouple if the thermocouple doesn's sense the pilot flame then it will not send a signal to the gas valve telling it that its okay to open cause the pilot is lit.

Dec 28, 2009 | Lite On Laars Lite 2 Heaters: 250,000BTU...

1 Answer

Pilot light on heater goes on and off when it is heating


If it is electronic ignition this is normal. If it is a standing pilot then you have a problem with the gas valve. With electronic ignition this will light the pilot on a call for heat.

Dec 14, 2009 | Procom ML300HGA Heater

1 Answer

How do i light a Reddy Heater rcp 2000 lp gas heater?


hold down the pilot valve knob and turn the arrow to pilot position push down on red button to allow gas thru pilot tube hold down and light keep button held down for 1-2 mins while pilot is on to heat up the thermocoulple then release and turn knob to on position.

Sep 12, 2009 | Reddy Heater RLP100 Portable Forced Air...

1 Answer

My honeywell gas suspended garage heater will not come on when the t'stat calls for heat. It is a heat only unit and neither the fan nor the blower motor will come on. The Heater is getting power to it...


The pilot light has to be lit before gas valve will operate. That's a safety feature so the valve won't open and fill the garage with gas and possibly cause an explosion or fire. If you have a standing pilot and can't get pilot to stay lit, it's usually the thermocouple and it will need to be replaced. Once the pilot is lit, the gas valve comes on and heats the combustion chamber up to approx. 100° to 125° a thermostat controlled fan switch will close and bring the blower on.

Sep 08, 2009 | Mr. Heater Suspended Garage Heater

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