Question about Dayton Gas Furnace Heater

1 Answer

Pilot light on Intertherm MG 075A furnace will not stay lite on windy days. Worked fine for 20 years but has been a problem the last couple of winters. thermocoupler has been replaced a couple of ti

Worked fine for 20 years but has been a problem the last couple of winters. thermocouple has been replaced a couple of times. Do not know what has changed.

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Expert
  • 499 Answers

If this really is a thermocouple unit with a standing pilot, it must be pre 1978, I would suspect a crack in the exchanger first off as thats potentially lethal, not a joke, many heart attacks, headaches, fibromyalgia etc comes from undiagosed carbon monoxide exposures!
And many die from it sadly as it is 100% preventable, a detector would be advised even if you are ok there. A draft can be from the roof car ruting out or misssing? any dryer, Jennair, bath fan, water heater, stove top and many hvac systems create negative pressure in the home by exhausting air and not returning any or less than removed, as in a leaky supply duct leaking in the attic, the furnace pulls X cfm and returns Z
and fireplaces etc will backdraft. gas valves do get tired too.

Posted on Oct 31, 2012

×

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

hotuna
  • 288 Answers

SOURCE: cozy wall heater lights fine then goes out after 3 or 4 minutes

Make sure all the wire connections are good and tight. Next lift off the cover and look for a little thermal disc mounted up by top of the heat exchanger. Most have a re-set button but not all. If you have this ,by-pass it ,see if that solves the problem, if so it may be defective, or doing its job and you have a venting problem. If you don't have this and have changed the thermocouple (was it a copper tube with a fitting that screwed into the gas valve, or did it have 2 wires, that is a pilot generator, kind of same thing) make sure the probe is set correct, with the pilot flame heating the top 1/3rd of the probe. The only thing left is the gas valve.

Posted on Dec 25, 2007

  • 1 Answer

SOURCE: Heater blower motor cycles on and off (frequently). I have a class 2 LR95329 Honeywell Thermostat

I had the same problem with a Coleman. The problem is the blower relay. You can find this at http://mobilehomerepair.com

Posted on Oct 21, 2008

  • 1 Answer

SOURCE: Williams Forsaire wall furnace won't light

Replaced the thermocouple, works like a charm.

Posted on Dec 14, 2008

farfield
  • 462 Answers

SOURCE: thermocouple replacement

Maybe you need to approach it differently. Why do you assume you have a bad thermocouple each time? If its because the whole flame goes out and you have to relite it, a lot of things can cause that.
1 ohm out a new thermocouple and record the ohms reading (read tween the center LEAD looking area on the end going into the gas valve and the outer shell (copper colored cover) If its a MV type controls it will have 2 wire ends. With the flame running now check the MV-DC on the same area, as the resistance. Yes you will need 2 hands extra for holding the flame on. It wont stay on without being hooked up. Typically you need 400MV for a thermocouple and 600 is the stahdardf output on a generator with wire leads depending on which you have. If your below these ranges You need to blow out the piulot area with compressed air and retry it. You should get an increase in the milli volts after cleaning because now the flame will hit the pilot or thermocouple or generator as designed and dust was causing it to be lazy and not get enough voltage back to the gas valve to stay on.

Now this is assuming you have the correct pilot orfice and its not too small like with an LP orfice installed on a NG system. The pressures are differant and the hole is way smaller on LP.

This is a really common problem with multi changeouts of thermocouples. Dusty Pilot burners. y policy has always been to blow it out first after observing the type and kind of flame. Then reexamine it after cleaning it out.

If this helps you please rate me as high as you can. If I have not given you enough information please post back so I can better aquaint myself with you problem. Good Luck!

Posted on Mar 23, 2009

billyvangogh
  • 108 Answers

SOURCE: reznor model# f125 pilot won't stay lit. i

Make sure the pilot is clean (Blue flame fully enveloping the top portion of the thermocouple) if its dirty the pilot will be yellow like a candle and barely touching the thermocouple ...quick fix is knock the pilot with a screwdriver...gently tapping it...knocking the dust out and getting a better pilot....the pilot could also be too small if its not making good contact with the thrermocouple....there could also be an Auxillary limit wired into the thermocouple which when open will prevent the magnet from staying closed....if all looks fine then the Gas Valve itself is likely gone (The magnet inside is not field repairable)

Posted on Oct 25, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Furnace goes out when blower should start


There is a sensor called a pressure switch that is attached to the area of the blower motor for the exhaust fan. It is bad or plugged.

Nov 16, 2015 | Heating & Cooling

1 Answer

INTERTHERM NO HEAT OR BLOWER


This could be failure of the igniter and/or thermocouple.

Jan 27, 2014 | Intertherm 56000 Btu Gas Furnace

1 Answer

How do I light an Intertherm furnace Model Number MG 068A?


Hello, if the Furnace is a standing pilot then turn the knob on the gas valve to pilot, you will hear a hissing sound then use a match or a lighter to light it at the thermoouple. Hold the knob on pilot for about 30 seconds and then turn the knob to gas and burners should ignite.

Nov 11, 2011 | Heating & Cooling

1 Answer

Garage furnace (standing Pilot) pilot stops after 30 mins.


it sounds like the afc the fan control not working could be dust on the afc

Jan 10, 2010 | Dayton Gas Furnace Heater

1 Answer

Burner flame going out on windy days on Coleman Evcon LP furnace


This sounds like a bad heat exchanger. It is possible that you do not see the crack because the crack is closed when the heat exchanger is cold (or room temp). Allow the furnace to heat up, this will allow the expansion of the crack. Turn the power off and examine the heat exchanger while it is still hot.

Mar 31, 2009 | Coleman Propane Forced Air Heater...

1 Answer

Gas firelog pilot light will not stay lite


try to replace the thermo couple

Nov 25, 2008 | Heating & Cooling

1 Answer

No gas to light the pilot


ignitor coil could be bad again

Sep 11, 2008 | Heating & Cooling

1 Answer

Pilot light out?


It fixed itself and worked fine the next day.

Thanks.

May 26, 2008 | Amana ARGS7650SS Gas Kitchen Range

Not finding what you are looking for?
Dayton Gas Furnace Heater Logo

162 people viewed this question

Ask a Question

Usually answered in minutes!

Top Dayton Heating & Cooling Experts

paulcarew

Level 3 Expert

2463 Answers

Mack Baxter

Level 3 Expert

381 Answers

Dan Webster
Dan Webster

Level 3 Expert

8220 Answers

Are you a Dayton Heating and Cooling Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...