Hello, I am new here and have a few questions about Lennox igniters. I would have asked if I found this information somewhere else or on here. So, I apologize in advance if someone has asked this question, or type of question, and it has been answered. I also understand that the site doesn't do any DIY advice, so I just want to understand the workings of the igniter. Any information is appreciated.
I have a igniter issue that I thought I fixed but apparently, I didn't The old igniter lasted at least 2 winters, my in-laws just purchased the house in 2020, I checked to see if the furnace was working correctly, gas was on, igniter was getting power, 120v, blower was working, etc. After confirming everything was working, the furnace would stay on if I manually lit it. I replaced the igniter with a 41k56 as that is what the mounting bracket held and what was installed. I checked that it was working and all was well. There was one thing that I noticed, the igniter would stay glowing long after the furnace was lit.
They informed me that later that night the furnace stopped working again. I went to check and the igniter was dead. When looking at the two igniters, both are in the attachment/picture, the one on the right is the new igniter and it is white, as if it burned up or was too hot for too long. The left one came out of the furnace. I noticed that whoever installed it, cut the wires instead of using the Molex connectors that are standard on all of the igniters I have seen or researched. Based on what I removed, the left wire coming out of the old igniter would be the hot side and left is the negative/neutral. I installed new Molex connectors to the old wiring.
When researching this furnace and iginters a couple things came up. I obviously removed a 41k56 igniter, or something similar to it. However, the G40UH - 48C - 110 - 11 isn't listed in the compatible furnaces for the 41k56 on technical hot and cold parts, see the attachment for the compatible units. When I went to repairclinic the 19w61 igniter showed to be compatible with this unit.
First question, is the igniter supposed to stay on after the furnace is lit or could this be a control board/flame sensor problem?
Second, is the 41k56 interchangeable with the 19w61 even though they require different mounting brackets? The 41k56 states 80v and the 19w61 states 120v. The reading from the wires is 120v.
Third, does anyone have the wiring diagram or can confirm that the wire farthest from the mounting hole is the positive and the one closest is the neutral?
Thanks for anyone that has read this in it's entirety and I appreciate any all and information that you can or choose to provide.
I have a igniter issue that I thought I fixed but apparently, I didn't The old igniter lasted at least 2 winters, my in-laws just purchased the house in 2020, I checked to see if the furnace was working correctly, gas was on, igniter was getting power, 120v, blower was working, etc. After confirming everything was working, the furnace would stay on if I manually lit it. I replaced the igniter with a 41k56 as that is what the mounting bracket held and what was installed. I checked that it was working and all was well. There was one thing that I noticed, the igniter would stay glowing long after the furnace was lit.
They informed me that later that night the furnace stopped working again. I went to check and the igniter was dead. When looking at the two igniters, both are in the attachment/picture, the one on the right is the new igniter and it is white, as if it burned up or was too hot for too long. The left one came out of the furnace. I noticed that whoever installed it, cut the wires instead of using the Molex connectors that are standard on all of the igniters I have seen or researched. Based on what I removed, the left wire coming out of the old igniter would be the hot side and left is the negative/neutral. I installed new Molex connectors to the old wiring.
When researching this furnace and iginters a couple things came up. I obviously removed a 41k56 igniter, or something similar to it. However, the G40UH - 48C - 110 - 11 isn't listed in the compatible furnaces for the 41k56 on technical hot and cold parts, see the attachment for the compatible units. When I went to repairclinic the 19w61 igniter showed to be compatible with this unit.
First question, is the igniter supposed to stay on after the furnace is lit or could this be a control board/flame sensor problem?
Second, is the 41k56 interchangeable with the 19w61 even though they require different mounting brackets? The 41k56 states 80v and the 19w61 states 120v. The reading from the wires is 120v.
Third, does anyone have the wiring diagram or can confirm that the wire farthest from the mounting hole is the positive and the one closest is the neutral?
Thanks for anyone that has read this in it's entirety and I appreciate any all and information that you can or choose to provide.
source https://hvac-talk.com/vbb/threads/2244249-Lennox-G40UH-48C-110-11-igniter-problems?goto=newpost
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