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Empire DV-35 low heat low flame

Empire DV-35 all works as it should - BUT has low heat. Main burner flame seems low. Could there be an issue with gas valve - not opening enough to allow full gas to main burner. Themopile voltage readings seem all correct.

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Check your gas pressure, You could have a gas valve problem or you could have a restriction in the air intake.

Posted on Sep 09, 2009

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Poilt is very week and will not open gas valve


The reason the control valve is opening slowly is the the Thermopile needs to be replaced. The Thermopile generates millivolts of electricity from the heat of the pilot flame, which then opens the gas valve when heat is called for. Also, check the pilot flame to make sure it's engulfing the thermopile. If it's not the pilot needs to be cleaned.

The Empire Comfort Systems, Thermopile part number is 672063

If I can be of further help, please let me know through the leave a comment link.

Apr 19, 2011 | Empire DV-35 Heater

1 Answer

I've got a 23 yr old 30DV3 whose pilot light works, and the thermostat & heating element seem to work, but not well. With the thermostat set at full hot, it just barely throws out any heat at all. ...


As I'm sure you already know, Empire Comforts Systems, no longer makes that model heater and hasn't for some years, now. I mentioned that, because if your unit needs parts, they may be almost impossible to get. In any event, there are a several things that may be causing the problem.

  • Low Gas Pressure - Burner is not receiving enough gas. Check for obstructions and have gas pressure at the unit checked.
  • Clogged burner or air intake (venturi valve) is partially clogged. Clean burner ports and venturi valve.
  • Gas line Shut Off Valve at heater not fully open. Check Gas line Shut Off Valve.
At 23 years old, you've gotten your money's worth out of this unit and it may be time to replace it. Empire makes several Direct Vent Wall Furnaces that are rated as High Efficiency Furnaces. In the long run, the money saved in fuel cost, would be worth installing a new one.

Hope this helps you solve the problem.

Apr 11, 2011 | Empire Direct Vent Wall Furnace;...

2 Answers

My unit was installed in 1996 and has been flawless ever since. the unit is not not putting out enough heat as of late and the 300 sq/ft area is on the verge of freezing up. I have the thermostat set at...


Whats the main flame like...strong or just weak? check the shut off valve and see if there might be another one around too. Probably a dirty clogged orfice or something blocking the gas from full open. maybe the main valve is going bad...try a few light taps and see if any changes. hows the wall thermostat? old? try bypassing that and see but i doubt it has anything to do but ya never know. good luck

Dec 09, 2010 | Empire DV-35 Heater

1 Answer

My dv 35 acts like the the gas burner sticks when ir calls for heat. I rap on the gas valve to get it to ignite. Can the gas valve be serviced by a do it your selfer?


no service on gas valve by diy er it a bad connection elecs or the valve is sticking on the seating , i would say to change gas valve i would not do diy on this valve ....

Aug 08, 2010 | Empire DV-35 Heater

2 Answers

Empire DV-210: Pilot light will light and stays lit, but when I


The thermocoupler is no good. It's that bulb sitting in the pilot flame. when it goes out it shuts everything doen in the main valve. It has to be kept hot by the pilot, that's how it know whether or not it is safe to open the main .

Oct 07, 2009 | Reddy Heater-10-12-15,000 Btu L.P.

1 Answer

Propane patio heater ignition problem


I would change the thermocouple and here is why:

The thermocouple is the pilot's, well, co-pilot! It is the electronic device that senses if the pilot flame is hot enough to sustain burning the gas fuel from the burner. If the thermocouple thinks it's safe, then it keeps open the main gas valve located in the pilot assembly. If the thermocouple does not sense enough heat from the pilot flame (such as when the pilot is out), then the thermocouple shuts off the gas valve to the burners.
How the Thermocouple Works
So what is this thing and how does it work? Well the thermocouple (technically called a thermocouple junction) is a device that contains two metal wires welded at the ends and placed inside a protective metal case. The thermocouple sensor is found at the business end of the pilot flame and is designed to be placed in the hottest part of the flame. The other end is connected to the pilot valve body. As the thermocouple heats up, it produces a small amount of electricity and when it gets hot enough from the pilot, send a signal to open the gas valve by using a solenoid operated by a 24 volt transformer. The thermocouple calls the shots, and by converting heat to an electrical signal, it allows the gas valve to open or close. Once the gas valve is open, gas is then constantly supplied to the pilot and as required for the gas burners (as called for by the thermostat). If the pilot goes out, then the thermocouple gets cold and produces no electric signal to open the gas valve's solenoid and the gas valve shuts off the gas supply to the pilot and burners

May 27, 2009 | Endless Summer Blue Rhino 235000...

1 Answer

Empire DV35 not hot enough


sounds like heater needs to be cleaned . I would recamend that you call a heating and cooling company to come out and take heater apart and clean. You can take front panel off and make sure you are getting go airflow through bottom of heater. If you feel comfortable with cleaning the heater yourself you can buy a burner brush at your local hardware store. If you decide to do this let me know and i can try an and help you with what you need to do. If you have the manual it will also tell you what to do to clean.

Jan 18, 2009 | Empire DV-35 Heater

1 Answer

Pilot will light, burner will not light.


check all limit switches to see if they can be reset if so reset it ,if problem reoccurs wich limit is going out ? make sure all wires are connected well to your gas valve , use a low voltage tester to make sure your firing circuit is operating properly , if you have a thermocouple it may not have enough juice left to open your gas valve

Nov 02, 2008 | Empire DV-215 Direct Vent Natural Gas...

1 Answer

Empire DV-215 Low Flame Issue


Either a restriction in the gas train, low gas pressure or a bad gas valve. Check the pressure on the gas line when on pilot and again when the burners are running. Depending upon what type of gas it runs on, you should have at least 4" W.C. if Natural Gas and 10" W.C. if Propane. If gas pressures test good and all valves are open, you are looking at replacing the gas valve.

Dec 08, 2007 | Empire DV-215 Direct Vent Natural Gas...

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