I have a York Diamond 80 with the following symptoms:
1. Will turn on and heat normally through several cycles
2. Eventually it will turn on, and the blower kicks on with no heat
and it has to be turned off with the thermostat swtich
3. When turned back on it will work a few more times (cycles) and then
go into the same routine of having to be reset
4. I have cleaned the flame sensor (wasn't bad to begin with)
5. The ignitor was changes a couple of years ago (thinking it was
that..) but the freqency of the failures is increasing
...could it be the curcuit board?
You need to watch it's operation when it's not working and see if it is
igniting. There are a number of sensors that are used during ignition. If
it is forced draft there will also be a low pressure sensor that has to be
activated before it will start the ignition. You already are aware of the
flame sensor. If it ignites but then shuts off that means it's not
recognizing the ignition. You need to check the sensors with a meter to
determine if it is a sensor or the control board. The paperwork that came
with it may give you some testing procedures for the sensors. It may also
describe any codes that the circuit board may flash using leds that tell you
what the circuit board is not happy about. For example something like
"three short flashes" may mean something. If you don't have any
documentation you might be able to find it on the internet. The companies
tend to use similar control configurations on a number of models and sizes.
If this is sounding a bit complicated then you might be better off calling a
service tech. Ask your neighbors who they have liked. Random parts
replacement will end up costing you more that having someone that knows what
they are doing fix it right the first time.
Service tech went for the ignitor, which seems to be working fine. It
may take hours before it goes into this no-light cycle, and then reset
it through the thermostat (which is sending the signal correctly) and
it works again (needless to say, don't really want to pay a tech to
sit there and watch my furnace for hours before it fails). From what
I have seen on a lot of the blogs it pointing toward the board, seems
Yorks have this problem. This thing is easier than the 2008 Volvo
(more wires than engine) in the garage, there are only a few parts to
check the pain is the works sometimes, sometimes not...
If you suspect a limit control trip, you can purchase an item called
"tattle-tail" which is a low current fuse, that you install across the
control. When the control opens and the current load is forced through the
"tattle-light" then the fuse pops - letting you know that the control had
opened sometime in the past. [Check with the manufacture for the limit size
of the fusible link.]
Is the limit "auto reset?" And if it is, does the trip register on the
computer led code? [Retaining history?] I don't know, I'm not a lennox
dealer. But it wouldn't really be hard to find out if I had the model
My guess is it does not retain history and you wouldn't see an led code
unless it happened while you were viewing the operation of the unit.
YOu fucking moron they are all junk.
But at least with York the wiring harnesses etc are generally fairly neatly
routed bundled rather than being a jumbled up mess and appearing as though
mice rats had originally laid the space out as being a potential nesting
You know HVAC Gay;
The newer furances provide safe, efficent heat. In fact, the newer heaters
are safer than those of yestur-year because of the saftey features. Many
folks who 'thought' changing the filter in the blower compartment was easy
failed to put the blower door on correctly, and almost killed the family by
mixing the conditioned air with the combustion air. [Not that you might
know the difference.] The newer appliances prevent this mis-hap.
Many a DIY has mis-installed a fossile fuel burning furance and killed thier
loved ones. The newer furnaces with their saftey features prevent this from
For you to condem the newer appliances is rectless and dangerous. If you
had any [sense] you'd STFU and sit back.
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