Original message
| StacieRunion
 |  "Hate this heater!"
, posted Sun 8 Jan 10:05  
I have a Lenox G23 with a Johnson G776RGD-11 Intermittent Pilot Ignition Control. It's been working find for the past 3 years. This winter, it started shutting down in the middle of the night. I thought initially it was the old electormechanical thermostat, so I replaced it with a new Honeywell Digital programable one. Yet, it still shuts down in the night. I have it set at 68 degrees and will wake up to the house a chilly 58 degrees. It takes turning the temp down below the house ambient temperature for a few minutes and then cranking the temp back up to get the furnace firing again. I called out a technician yesterday who charged me 186 to clean the flame sensor. Yet, last night, the temp still dropped down below 68 degrees. When I woke up, the thermostat told me the heat was on, but when I checked the furnace, the blowers were running, but the flames were not on. Any suggestions? I know this pilot control has a 60 minutes lockout, but what is causing the flame to not trigger? I would appreciate any help!
NeedHeat
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Replies:
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| STATENG
| "Re(1):Hate this heater!" , posted Sun 11 Jun 08:01:
I had a similar problem with a different model. My problem was the blower control board that controls when the blower fan turns on and off. The time delay for when the blower turns on was too long. So, it would work for awhile. but if it cylced a few times, The Heat exchanger would retain more and more heat. So the High temp trip would go off at night. and the unit would have to be reset. I had to set the delay on for a shorter time. and the delay off for the longest time setting. This would make the blower turn on 90 seconds after the furnace lit and the blower will run for longer after the furnace turned off to remove excess heat from HX. (it also is more efficient)
STATeng
[this message was edited by STATENG on Sun 11 Jun 08:04] |
| yruhot
| "Re(1):Hate this heater!" , posted Mon 29 May 00:55
Saw you problem with your heater, one thing you must remember with this type of heater is that they are a big time Ground dependant system. What I mean by that is this unit it looking for a ground through the flame when running and if it looses that sight of the ground it says to itself that it has lost flame for a fraction of a second and theres a problem and all the saftey circuits take over.Things may have been good at the start but as time has gone on blackpipe connections on the gas line into the unit may have got a little corroded,flame rod may have got some sulfer build up on it providing just enough of a resistance to shut er down. I had a sharp guy tell me once to run a stranded type 12 gauge wire frome each component from the piolet frame assembly to the gas valve to the johnson spark box you have, clear to the chassie ground in the equiptment and that may help the unit see a good ground. Also it's quite normal for those sparkboxes to go out in the midel of the night if located in a cold place. Works fine at 3pm but 3am is another story. Electronics seem to be really tempeture sensitive especially when theres a problem. Knew one service tech who would leave a oh 10 watts light on in the control panel to preheat the sparkbox. It would work for while.dw
yruhot
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| WarAir
| "Re(1):Hate this heater!" , posted Sun 8 Jan 15:15
If you have the old mec. blub Therostat, it could be the Heat Antictpator. At the T-Stat. jump the red wire to the white wire and see if the problrm still happens. If it still does this than its not the T-Stat.... Don't leave the red and white together because the heat will stay on... This is just for a test of the problem,,,
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| | acefurnacefxr
| "Re(2):Hate this heater!" , posted Sat 24 Feb 15:44
test
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