I have a York Diamond 80 unit. Control board failed and was replaced two days ago. Heating worked great for 36 hours and quit again.Symptoms are:1. Plug unit in.2. Exhaust fan starts3. Igniter lights4. 1st time I checked it, flame did light for about 45 sec.5. Now flame does not light. I think I hear the gas valve click.6. Fan continues to run and unit tries to light, but no flame.7. Error codes are: Green when unit is plugged in - 1 Red flash as unit tries to light - 7 red flashes when I push the error retrieve button.
Make : Your
Model : Diamond 80
1. 2 days ago - Replaced control board with S1-33102956000 Control Board kit
2. Heater worked great for 36 hours
3. Heater quit again sometime last night
4. Unplugged unit and plugged it back in.
5. Wrote down error codes
6. Watched it try to light
7. Check wiring connections on control board
8. Contacted you
Can you verify if 24 v ac is present at gas valve when ignition should occur?
Hmmmm1st - 24VAC was present at the gas valve during ignition1. Heater lit and has been heating for about 10 minutes. Temp at thermostat has come up 3 degrees.2. Conditions: Fan and control panel panel cover was in place. Burner panel cover was off (NOTE: during earlier tries with no ignition, I held the fan/control panel access cover switch "Down"). Unit had been unplugged for 30-45 minutes.
was burner cover on when it faaulted?
Burner cover was on when it first faulted.Let me put the answers in time order.1. When I first decided that the heater was no heating, I went to it, pulled the burner cover off, unplugged, replugged and watched the burner with the cover off.2. During troubleshooting, I repeated the above several times and had the burner cover on and off.
With cover off....has burner failed?
and when failed...we mean ignitor glows but flame doesnt light at all?
And out of 10 cycles done, how many times would estimate fault to be?
9PS - Room temp at thermostat is at setpoint. We'll see if it lights again before long.
and after each fault it codes 7?
Do you have a long light or small propane torch?
Yes - Propane torch
This is just process of elimination.
Sometimes a glow ignitor doesnt reach 1800 f in order to light gas. It glows but not hot eneough...to eliminate this option we point torch beside the ignitor during start up and see if it lights reliably with torch...understand the point?
YesThe unit just shut off at temp setpoint. I'll unplug it so it can come on till I get there, plug it back in and help the igniter with a torch if it doesn't light.Is this correct?
correct...we just want to eliminate whether gas is there but ignitor weak....or if gas isnt there...
Darned, contrary thing lit off like a champ. It did not need any help.
removed tube from pressure switch and cleared barbed fitting on Furnace where tube attaches
check tube for cracks
no vent blockages
sensor clean with steel wool
None of these are suspect but good things to do as preemptive...
Your issue is either no gas
Or the 2 dont get together.
I've not done the preemptive stuff yet, but will.Thanks for your help.Do you have igniter part number and installation instructions by any chance?
The part number is(NNN) NNN-NNNN/p>
example - http://www.theignitorstore.com/catalog/york_igniters
Any local heating contractor should have one also.
Endorsed for unlimited heating, cooling, oil burners, boilers, refrigeration, hydronics
Thanks much for your help
I wish you luck...and I am available for follow up.
Some follow-up.Ultimate cause of my problem turned out to be a loose connection internal to the gas valve. I noticed that when I measured voltage across the valve, everything worked. When I took the voltmeter probe off, the heater stopped.I replaced the gas valve and everything is nice and toasty warm.Thanks much for your help. It is really nice being able to troubleshoot with you.