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Lennox pulse furnace safety notices: This document describes carbon monoxide gas (CO) leak safety hazards on certain models of Lennox hot air heating. Champion part # F and Y Auburn Used on all Lennox Pulse furnaces G14, G21, G21V, GSR14, and GSR This part has been tested and. **All G/ units require the use of at least one muffler in the exhaust pipe and one in the intake The installation of Lennox high efficiency gas furnaces.

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Lennox G21 furnace stops working

Thread Tools Show Printable Version. Lennox G21 furnace stops working Hi people! I notice that intermittently the furnace is not operating even though the thermostat is asking for heating. I changed the pennox battery just in case. I went in my furnace manual and checked some troubleshooting information. First thing that stands out it that the controller LED light is off. I have 24VAC from the transformer and thermostat input when thermostat is asking for heating.

When I unplug the controller connector 6 wires going to it and plug it back in, the furnace starts.

This tells me the controller has power to it I believe. The furnace manual says change the controller if the power goes to the controller but it does not operate. But the furnace turns on on a power cycle. At the time of this post it has been going good for 3 days. However, previously it did the same thing and the problem came back. I added water to the pipe that goes down to the pump no I did not send water to the furnace.


It seems to turn on and drain after a certain quantity of water it put into it. He said he cleaned the flapper and the paper he left with us says he also checked the pressure limit switch. On a side note the guy seemed in a hurry only my girlfriend was there at that time and the impression she had is that the guy did not do all he lennxo with that service call. He only did 3 things. The last tech a couple of years back seemed to do more on a routine pennox call.

In short I don’t want to play around with the furnace equipment that could potentially be unsafe. I only tried things I believe are safe to do.

Also what kind of maintenance should I have get done on my furnace regularly? Should I have a routine maintenance done every year like clockwork?

Contact the company that performed the service and explain that the problem has not been lenhox. If they refuse to help, then you will need to find another company that knows Lennox equipment well. Any advice on what to check would be considered DIY and is not allowed on this site. Originally Posted by hidalgo Join Date Mar Location burlington county n. Originally Posted by tator Originally Posted by ted. Lennox dealer sincenever heard of a “mis-fire” lennxo.

You better find it out how to do it before you kill someone. Maybe you use diffent term for it but its how you test for crack heat exchanger.

If I can tell you on here how to do it with out getting in trouble of rules I will. No you need to call Lennox up and ask them about it.

Lennox Pulse: Furnaces & Heating Systems | eBay

I cannot believe you all not knowing that. What other way you find out if you have bad heat exchanger with out doing the pump test. The best Lennox headoffice to ask that is Grove city Ohio. By the way after you had the 3rd no-fire the board will lock out it self to make sure the furnace lennxo not come back on.


Lennox Pulses

That is another test of the pulse safety. Once again you need the training. Originally Posted by wh Not being a pr! Ok were will you smell little of that gas at? I know out of the heat exchanger right check mate!!!!!

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Then One Foggy Service Call All times are GMT The time now is HVAC-Talk is gg21 provided by: Results 1 to 13 of 28 Thread: I hope your kidding, if not you might want to follow your own advice!! The way you check the heat exchanger is by doing a pressure test and it has nothing to do with what you described. By the way, I lemnox work for a Lennox dealer like several others here and I see Pulse furnace just about everyday.

What you are describing is not even close to how you pressure test a Pulse. Maybe I’m wrong but I think you are totally uninformed about what your doing and you might want to get some training.