Question about Heating & Cooling

1 Answer

Lennox heater wont turn on when switched. It is a Lennox 80MGF3/4

Posted by on

  • florikry Jan 06, 2008

    Ed this is florikry, I dont know what unit and what cord you are talking about? Thank You



1 Answer

Sorry, I wished I could be more percise on my answer, but your statement on the problem is too vague. An AC volt meter is necessary to check the unit. First one needs to check the cord to assure there is 110-120 volts AC present. If so, comtinue to check if the fuse is bad. If the fuse is good, it would likely be a heat senative thermal fuse. I hope this somewhat helps.
NC Electronics
Mills, Wyoming

Posted on Jan 06, 2008


1 Suggested Answer

  • 2 Answers

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

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this 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.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

Gas furnace wont light

if pilot light is on, probably should be a knobs with settings for PL only, on, or off.

Nov 09, 2013 | Heating & Cooling

1 Answer

Lennox g26 will not fire up

does the inducer motor turn on? are all the safety switches closing properly? hot surface igniter come on? need more info

Nov 13, 2012 | Goodman GMS90703BXA Heater

1 Answer

Reset limiter switch on Lennox g10 furnace

Try turning the power off to the unit sometimes this works

Mar 05, 2012 | Heating & Cooling

1 Answer

Lennox gas furnace G21Q4/5-100-1 sometimes won't kick on

Hi check out the flame senser is clean also jump ou tthe pressure switch see if it lights when you do this , igntion modul is just a box with some push on wires just get the right one the info is all on the module

Feb 16, 2010 | Heating & Cooling

1 Answer

We have a Lennox furnas. It runs on propane. Sometimes it will not come on. If we turn off the switch by the fuse before the furnas, it will usually come on. This is not 100%. I have installed a new...

The unit is locking out on a safety. Do you have the model number of the heater? How old is it? This may not be a minor problem. You may want to call a Lennox dealer to assist you.

Jan 01, 2010 | Heating & Cooling

1 Answer

Auto burners wont come on my lennox merit series hvac unit.

At whic step does it sto at and theres your problem. step-1 thermostat calls for heat and vent fan turns on.... step--2 the glow plug or hsi lights ... step-3the main gas valve comes on and heats the box...step-4 when the box heats up it closes a temp. switch to start the main fan motor!

Dec 21, 2009 | Honeywell Heating & Cooling

1 Answer

Lennox lf24 garage heater, starts then shuts down.

Here is a link to the manual for your unit heater:

The 4 flashes is a high limit or roll out switch is open. There are 2 or 3 little brown or black button looking switches with a little button on the top and a wire attached to each side. Press the button on each, you may hear a slight "click". If you do, that is the one that was open. Hope this helps.

Oct 31, 2009 | Heating & Cooling

1 Answer

Furnace will not heat.

Most of the Lennox G-16s that I have repaired were having problems with the gray Penn-Johnson Piggyback igniton control module.
This is best repaired by replacing the spark module. Sometimes it may be neccesary to replace the gas valve also. Lennox updated to a ROBERTSHAW ignition system. Honeywell can also be used.
Also check that there is no water in the pressure switch or tube.
Hope this helps.

Jan 13, 2009 | Honeywell Electronic Programmable...

Not finding what you are looking for?
Heating & Cooling Logo

Related Topics:

142 people viewed this question

Ask a Question

Usually answered in minutes!

Top Heating & Cooling Experts

Paul Carew

Level 3 Expert

3335 Answers

Mack Baxter

Level 3 Expert

383 Answers


Level 3 Expert

82322 Answers

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

Answer questions

Manuals & User Guides