Question about Rinnai Desa Vent-Free Infrared Gas Heater: Vent-Free Infrared Gas Heater(18,000 BTU)

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The pilot light goes out when I turn the gas control know to on

Rnv40

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Clean the flame sensor, thermocouple, or power pile located on the pilot with steel wool.

Posted on Dec 01, 2013

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1 Answer

I replaced the thermocouple and I can not get furnace to light.


turn to pilot to light pilot
hold and wait should be instructions on control
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Nov 02, 2015 | Heating & Cooling

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Rnv40 pilot goes out


Sounds like you need a new thermocouple. here is the link to the part
http://www.ibuyfireplaceparts.com/model/radiance-rnv40-vermont-castings-gas-b-vent-stove

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We have an atwood lp gas water heater 6 gallon g6a7 white rogers control. The pilot lights but when we turn it to on it goes out, even after holding it up to a minute. It was running fine, we thought we...


If pilot stay lit, then thermocouple is working.
If pilot will light, then you have gas. If pilot goes out when pilot button is released, then thermocouple is next suspect.

Thermocouple tip must sit in pilot flame.
The pilot light heat applied to two different metals inside thermocouple causes small current.
The current travels back to gas control valve through copper line.
If the gas valve receive this current, then a magnetic switch stays open and allows gas into the gas control valve.
The magnetic switch is on the end of the red button you push down when lighting pilot. Essentially the red button is an override to the magnetic switch.
If the gas control valve does not receive the current, then the magnetic switch does not stay open when you release the red button.
When replacing thermocouple, note that it is not screwed very tight into the gas control valve. Finger tight + 1/4 turn. If it is overtightened, then the small thermocouple current shorts out against the gas control body.

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CGA Mclain .Natural Gas boiler issue 70k btu with a effikal ventx damper, model RVGP. There is no blower for ventilation, no control board with lights. Pilot light will not stay lit. have already replaced...


hey Carli suspect you mean the pilot goes out as soon as u turn your gas control valve back to the on position!? If this is so, you will have to probable reset the flue spill switch located right at the exaust outlet. OR, SOMETIMES THEY HAVE ANOTHER LIMIT switch in the same circuit in series. If the pilot goes out when u release the pilot press down knob, then it is your thermo couple is loose or fininshed,or the pilot flame is not aimed properly at the sensor (thermo couple)

Sep 21, 2011 | Heating & Cooling

1 Answer

The pilot light comes on when control depressed but when it is released so it can be turned to a gas control it goes out. If the fire is lit successfully, it then goes out after approx 10 mins


if pilot is blue and torch like then the thermocouple is bad. if pilot is layz and yellow then it needs to be cleaned.remove pilot gas tube and clear orifice,looks like small thimble. reassemble and check tightness with soapy water when gas is flowing

Jan 04, 2011 | Heating & Cooling

1 Answer

How do i light pilot light?


Remove front cover,or just lower section if you can. they usually just need to be lifted up about an inch or so and pulled out. However some have covers that snap in place. After you remove cover locate gas valve. It should have a control knob on top with markings for on, off, and pilot. Set control to pilot. Follow lines from gas valve to burner compartment, one goes to main burner one ,small copper colored line is the thermocouple, other line is the pilot. Turn thermostat down as far as it will go. Make sure gas supply valve in line to heater is on and then depress pilot control , when you have pilot control depressed have a match or other small flame source close to pilot assembly. If it lights then hold down on pilot control for a couple of mins. Slowly release pilot control and if it stays lit turn gas control to on. Turn thermostat up to call for heat and burner should light. If pilot doesn't stay lit when you release pilot control then try again holding pilot down longer. If it still won't stay lit then thermocouple will need replace. Good luck. Thanks

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1 Answer

Pilot light is lit both on oven and stove top... previous user says to turn on gas and lite "sensor" or "2nd pilot" it stays lit as long as oven knob is on but oven burner does not light. "sensor" goes out...


On standing pilot ovens the maker uses a safety device to kill the gas in case the pilot blows out. As long as the pilot is lit the gas safety magnet hold the gas flap open inside the safety valve.To save energy the pilot has 2 flames. The standby pilot keeps the cooper/nickel probe/sensor warm so the oven will light faster, the 2nd pilot is much larger, only appears when the oven control is turned on and this is what opens that valve. So when you turn the oven knob on the gas leaves the control and goes downtown to burner land. If that pilot is lit and that slow opening flap inside that valve is open, then the gas will enter the burner tube and ignite when it hits the pilot. Pretty slick ain't it? So what can go wrong? With age the flap inside the safety valve will wear out, get weak, work a little, then take forever to light and eventually just goes bye bye. When you get ready to replace the valve it ain't gonna be adjusted exactamundo, you gotta tweak it. To do so after bubble testing for leaks and lighting the pilot you turn it on and observe the flames. It needs to be not more than half way up the flame spreader. If it is to small of a flame it will take forever to bake even a pie shell, if it is too much their could be burned bottom and in some cases fire hazards. OOPs.

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could be thermocuple or pilot blocked clean pilot then try make sure you are turning to on and not back to off i was doing this the other day some go clockwise some anticlockwise

Jan 02, 2010 | Heating & Cooling

1 Answer

Pilot light


Hi the thermocouple is a long copper wire that goes back to the gas valve from the pilot .

i would clean the flame senser first , then check the pressure switch jump this out , then check the fan control or snap disc jump this out see if it runs if you need A THERMOCOUPLE then honeywell universal will do

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1 Answer

Gas wall heater won't light


You need to bled the line longer and when you get lited hold down for a good minute.When the gas gave out ,there could trash in the line.I would take the line off and blow gas through it undtil you can smell it.

Mar 12, 2009 | Heating & Cooling

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