Lennox 80UHG Series - “Rollout Switch Open”? - HVAC - DIY Chatroom Home Improvement Forum

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


Thread Tools Display Modes
Old 11-17-2013, 12:32 PM   #1
Join Date: Nov 2013
Posts: 1
Rewards Points: 10

Lennox 80UHG Series - “Rollout switch open”?

Lennox 80UHG Series - “Rollout switch open”? Vertical Flame Ignition Rod won't light and combust gas:

I saw a post for this issue on this and other forums, but I didn’t see what exactly the problem was and its resolution explained.

I live in a town home community (6 units attached per/bldg; all the same furnaces, water heaters, ranges, etc.). My furnace went out the other day. I looked at my neighbors with the panels off and safety switch depressed, it works fine. The control/electric panel clicks a few times, the “Combustion Air Blower” and “Blower Assembly” kick in; the “Vertical Flame Ignition Rod” heats up red, gas flows and the horizontal gas burners ignite w/gas flowing and we have heat!. I also noticed for my neighbors working furnace, there were two LED lights, also noted in the “Product Instructions” I have, that the TOP one was GREEN and the BOTTOM was RED and they were both a “”Simultaneous Fast Flash”.

With mine that stopped working, with the front panels off and the safety switch depressed, heat set to on higher than the room temp. registered and new batteries:
(1) The “Control Board/Transformer” has a slightly different “click” sequence than my neighbors that is working. I’m trying to get it down, it’s like Morse code! lol
(2) The “Blower Assembly” kicks in and runs.
(3) ***The “Combustion Air Blower” starts rotating then stops dead. (***Could there be an issue with the “Pressure Switch” and communication(s) with the “Combustion Air Blower”? I checked the hose running for the pressure switch to the combustion air blower and its physical integrity seems to be good; i.e. – not rotted no cracks, etc.)
(4) ***The vertical “Flame Ignition Rod” will not heat up, glow red and combust gas (i.e. – gas doesn’t even appear to be flowing). All other gas appliances in the unit work fine.
(5) ***Also, the LED Lights on mine, that is NOT WORKING:
a) The top one is a solid “GREEN” no flashing at all.
b) The bottom one is “GREEN” with a SLOW green flash.

Per the manual for the LED LIGHTS, it indicates that if the upper LED light (LED 1) is ON, and the lower LED is on and a a Slow Flash (LED 2) that [“Rollout switch open; OR; 12-PIN connector improperly attached]. I have not messed with, tried to reset the “Rollout switch(es) but that is what I’m going to attempt today and see what happens. Any help you provide would be greatly appreciated! THX!!! PS – I have browsed/read online forums for this issue.


rogermoore007 is offline   Reply With Quote
Old 11-17-2013, 12:39 PM   #2
An old Tradesmen
Join Date: Oct 2008
Location: Somewhere
Posts: 34,420
Rewards Points: 7,830

A roll out switch is a safety. Often when they trip, the heat exchanger is cracked, or the flue is restricted.


When posting in certain forums, knowing your location will help others give better feedback/advice/solutions to your questions.
beenthere is offline   Reply With Quote
Old 11-17-2013, 12:40 PM   #3
Hvac Pro
yuri's Avatar
Join Date: Nov 2008
Location: Winnipeg, Canada
Posts: 16,021
Rewards Points: 180

if the rollout switch is open the board is programmed to run the indoor blower as it thinks the furnace is overheated and needs cooling down. tripped rollouts is a VERY serious condition and I would recommend you get a Lennox tech to find out why.
"Cut it twice and it is still too short".
yuri 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
taco sr503-4 switch jmon HVAC 53 11-12-2012 06:26 PM
Where to buy a Lennox limit switch in Pa Blackbirdin HVAC 3 11-07-2012 03:10 PM
3 way switch layout has me confused crescere Electrical 5 09-08-2012 10:26 AM
Just for fun Andy in ATL Electrical 56 10-20-2009 09:33 AM
Basic Switch wiring question; Dimmer to Toggle switch (Pictures included) inspectator Electrical 8 08-07-2007 01:19 AM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1