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The Lennox GH6-120C-1 furnace uses a standard 1-inch thick filter. The filter should be replaced every 1-3 months, depending on the level of contamination in the air and the frequency of use of the furnace.
To determine the correct size and type of filter for your Lennox GH6-120C-1 furnace, you will need to refer to the owner's manual for your specific model. The owner's manual should provide information on the recommended filter size and type, as well as instructions for replacing the filter.
In general, it is recommended to use a high-quality filter that is capable of removing contaminants from the air, such as dust, pollen, and other allergens. There are several types of filters available, including fiberglass, pleated, and washable filters.
To replace the filter, you will need to locate the filter compartment on the furnace. The filter compartment is typically located behind a panel or door at the front or side of the furnace. Once you have located the compartment, you can remove the old filter and install the new one by following the instructions in the owner's manual.
If you are unable to locate the owner's manual or are unsure of how to replace the filter, it is recommended that you contact a qualified HVAC technician for assistance.
What is the model number? I have an SLP98 (installed on 11/29/2011).... and if I take the cover off the front of the furnace the panel that has the fancy "Lennox" badge on it) you will see two clear round windows about the size of a half dollar (one high on the furnace box and one lower on the blower box.) If you look downward into the window on the blower box you can see a red LED display that will sometimes flash error codes like E228 (one character at a time). If your model has something like this, let me know. I've done some DIY fixes recently out of necessity....and their easy.....and several technicians confessed they didn't know much, if anything, about the newer high effieciency Lennox gas furnaces.
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https://www.youtube.com/watch?v=yXIxgzwMkPs
Nov 17, 2012 - Uploaded by grayfurnaceman
This furnace should light its pilot with a spark then the pilot proves its on ... Troubleshoot an ignition problem on a Lennox gasfurnace .... Pilot and no inducer but is the same model as that great video! ... You probably have dirty burners. ... How do you know spark module is not sending 24 volts to mv and pv ...
The Btu rating for this furnace is 40,000. Since the furnace has a 3 /34" metal flue collar on the top of the unit, you can not use PVC pipe to vent it. Only 90+ efficient gas furnaces can use PVC pipe for venting and the also come equipped with a condensation pump, which yours doesn't.
At tstat press options. Press installer setup. Yes, you are qualified. System settings, non heat pump. Gas/ oil heat. Save changes. That should do it with no wiring changes.
The bearings are bad. You need to replace the motor. Motor cost $75 to $125. Labor is on avg. $150 to $400 with an decent A/C Company . You can try to oil it but its not recommend by Lennox. That furnace at the time they build it was top of the line. Good Luck.
the best furnace you can buy is a two-stage furnace with a variable speed blower, the most effecient furnace you can buy is the 95% one. the most important thing is the technician installing it. there is a very advanced setup configuration that needs to be followed depending on your outside unit, your ductwork, and the living environment. find a NATE certified dealer. also, look for a Lennox Premier Dealer, and an American Standard Customer Care dealer. you can find them by going to Lennox.com and AmericanStandardAir.com
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