Lennox Furnace Fails To Ignite - HVAC - DIY Chatroom Home Improvement Forum

Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > HVAC


Thread Tools Display Modes
Old 01-01-2009, 02:27 PM   #1
Join Date: Jan 2009
Posts: 3
Rewards Points: 10

Lennox furnace fails to ignite

Lennox Model: 10GCS030-75-IPA
- Unit is about 8 years old.
- Unit was serviced (cleaned and check by professionals 6 months ago)

Control board model: 60M3201
- I replaced this about 4 years ago.

Here is the sequence:
1. Thremostat calls for heat
2. Inducer fan kicks in
3. Gas flows
4. I guess ignitor on electrode does not spark - I hear the "click"
5. runs through the process 3 tries (including the "clicks") then goes into Lockout - LED on contol board flashes twice then pause then repeats ... meaning that the heat sensor on electrode was unable to detect heat.

Might of been stupid of me, but after reading alot and watch the process I concluded that if the inducer fan was not able to create enough negative presssure then the control board would not signal for gas. As a result, I was able to light the gas manually and heat the house back up (tough when it is a holiday and everyone else in the house is female and complaining of cold).

If I got all the above right I am now into trying to figure out if I replace the electrode or the control board. I have a meter so how can I tell if voltage getting to the ingnitor or not?

If I did not get it all right then
- should I stop manually lighting the furnace?
- would it be something associated with not enough negative pressure and how I go about checking that and figuring out what to replace.


Kool Breese is offline   Reply With Quote
Old 01-05-2009, 11:58 AM   #2
Join Date: Jan 2009
Posts: 3
Rewards Points: 10

Ended up having a technician come out - it was a faulty ignitor cable


Kool Breese is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Furnace fails to ignite now and then... diitto HVAC 7 11-23-2016 04:19 PM
Lennox Furnace G27M Series Unreliable operation: pressure switch or else? sheppard1977 HVAC 7 01-14-2013 05:42 PM
Ducane Gas Furnace fails to stay on franko HVAC 25 12-08-2011 04:14 PM
Problems with new furnace..Overheating, having to reset. Furnace too big? Tommy2 HVAC 41 12-01-2008 01:55 PM
New Cased Coil - Install to Furnace - PICTURES!! hartkem HVAC 39 11-18-2008 01:45 AM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1