ICM Controls ICM2902 IPI Gas Ignition Control Replacement for Popular Models, Including Lennox 30W33 and JCI G776RGD-14 Series Controls

This was an updated product for my furnace. After finding it and placing my order, it arrived in a timely manner. It was easy to install and is working fine. Furnace issue fixed!

My furnace (a Lennox Model G23Q2/3-75-4) has been having intermittent trouble for a couple years that came to a head this winter. It would have issues sparking and initially lighting, or when it would light, it would spontaneously cut the gas (killing the heat) while continuing to blow indefinitely. We'd previously had service techs come out and take a look at it, and they couldn't figure out the problem and just recommended buying a new furnace, so we decided to deal with it acting up, but it kept getting worse and worse until it finally became almost useless. After trying to replace some smaller and cheaper parts, I went with replacing the old Johnson Controls G776RGD-11 Intermittent Pilot Ignition Control with this controller, based on the below review from Angelo (thank you Angelo!!). Fortunately, replacing that Ignition Control with this new ICM control has solved those problems and my 20+ year old furnace is once again working just fine.In the course of doing my research, I found an excellent link (search "cozy parts Johnson ignition control replacement") that had some really useful explanations. Basically, the Ignition Control takes quite a beating, electrically, and the Johnson Controls modules that were originally installed in many of the Lennox furnaces were found to be fairly unreliable and their failures would show up in a variety of ways, usually intermittently. Lennox eventually released a conversion kit, the 53L90, which would convert from a Johnson Controls box to a Honeywell box, complete with new flame sensor and wiring. These kits are generally fairly expensive (though you might be able to find one somewhere for a decent price) but the wiring and other goodies really aren't necessary - the existing wiring needs only slight modifications to work on either the Honeywell Ignition Control or this ICM Ignition Control, and this is a much more reasonably priced unit than those conversion kits are. This ICM Control is working well for me so far and I'm quite happy with my purchase, reviving an old furnace for $100 and saving hundreds in repair fees or thousands in a new furnace install.Regarding installation, keep in mind that you will need to redo the heads on a couple of the wires to convert to this Ignition Control. The old Johnson Controls module uses both 1/4 inch and 3/16 inch spade connectors, and this one uses only 1/4 inch connectors. As a result, you'll have to redo the heads on two of the wires. This is fairly easy to do with a normal wire stripper and $5-$10 worth of parts. You'll cut off the old spade connector (try to save as much wire as you can to make your connections easy), strip about 1/4 inch off the wire, slide a 1/4 spade connector on there, and then crimp it. If you like, you can throw some heat shrink on there (or buy insulated spade connectors) to make everything nice and neat and clean after you do the rewiring. Similarly, you'll have to redo the ground as well, as the Johnson Controls module just had a tiny ground wire that went to a plate on the back of the controller. I bought some 18/2 lamp wire, cut the single wire I needed from the pair, put a spade on the one end to connect to the Ignition Control and put a ring terminal on the other end and put the mounting screw for the Ignition Control through the ring terminal to ground it the same way the old Johnson Control one was grounded. Aside from redoing the heads on a couple of the wires and making a new ground, the actual connections on this are a one-for-one match to the old Johnson Controls module, just remove the wire from one and plug it into the same labelled socket on the other. While electrical is always scary for a homeowner to try doing themselves if they're not comfortable, this truly was not very difficult - the most time consuming portion was buying the connectors at the hardware store.FEB 2023 UPDATE: This ignition control module failed in the same exact way as the old Johnson Controls module. I've replaced it with the aforementioned Lennox conversion kit, which included a Honeywell S8660K module to replace it. The S8660K is no longer produced, but Honeywell has replaced it with the S8610U3009. The only thing the Lennox conversion kit *really* provided me was the new mounting bracket, but a lot of the conversion was stuff that I already mentioned here in going from the Johnson Controls module to this ICM one. All of this is very easy to DIY.

Good substitute for the OEM. Works perfect!

My spark igniter in my Lennox furnace was sparking erratically. I bought this unit to replace my G776RGD-11 unit that was in there. I took a chance since I did not know if this unit was a direct replacement for my unit with a different model number, but it worked fine. I only had to replace some of the crimping wire terminals to larger ones to fit this box. My old box had a ground wire running from a ground terminal to some feet on the bottom side of the box which this was missing. Simple fix, though. I just grounded the same wire to a screw on the furnace case.

I used this unit to replace the failed part in my older Lennox HVAC ( model G23Q2/3-75-4). It was an easy install once you spliced a couple of new female spade connectors to the existing lines. All the spade connections in the new ICM unit are 1/4”. I had smaller female ends on three of the existing wires which required replacing.Of note, this unit does not have the metal back plate like the original. To ground the unit I used a slightly longer wire to ground it to an existing screw on the HVAC unit. Once that was done it was straightforward. The units are the same size and have the same mounting holes.I would have given this seller a higher rating, but I had to order a second unit and return the first one I received. The first one I received had a broken insulator at the spark connection and someone had left a connector attached. Obviously a used unit and poor example of quality control. The picture is of the first unit I received. The second unit was in “as new” condition.Overall I’m satisfied with the ICM unit because it was an easy fix and saved me money.Read on for the symptoms my HVAC was having:I initially thought it was the flame sensor so after doing a little troubleshooting I noticed the HVAC would only ignite after I had cut power to the system and turned it back on. Essentially resetting it. After restoring power and activated the demand for heat, I would see the led light up solid and hear the clicking of the igniter. The clicking was “continuous” and the pilot light would light followed by the burners (flame sensor was ok). But once the system turned off and the demand cycle restarted I noticed the clicking was “intermittent”. The pilot would not light and the system would try again a little later with the same result—no heat. Resetting the HVAC would start the process all over. I decided to replace the ICM unit since the igniter seemed to be sporadic.

worked great for 13 days, stopped working on the coldest day of the year, 5 degrees. not worth the money

What can I say. It works. The price was right. It’s easy for a layman to install. Shut off the electricity to the furnace. Take a picture of the original installation and double check your connections. Easy peezy. Time will tell if it has any longevity. Ask me in 10 years.

I replace the unit on my furnace with this. Carefully labeled all the wires before removal of old unit. Installed and furnace now runs great. Saved mucho bucks.

Good

Works good