Original message
| william-welsh
 |  "Problem burning up igniters"
, posted Mon 20 Feb 14:49  
igniter on luxaire furnace keeps blowing as soon as furnace starts! checked control board, tested voltages all tested as listed for white rodgers 50a55-843. but the one in the furnace is a 50a50-241. Test light flashes one time on start.
Any Ideas??
|
|
Replies:
|
| kimmy
| "Re(1):Problem burning up igniters" , posted Sun 23 Sep 21:15
I have found this problem in old Clare furnaces.
Their HSI are mounted horizontally inside the heat exchangers.
All rust and dust drop on these HSI and create hot spots and burn out HSI.
Vertically mounted HSI last longer than horizontally mounted HSI.
The older the furnace is the more problems you have. Unless it is a really old furnace.
30+ years in the HVAC/R trade.
Started when equipment was repaired not replaced.
Still feel the same way.
|
| supercold
| "Re(1):Problem burning up igniters" , posted Mon 16 Jul 22:55
I replaced a 50a50 control board today. The replacement board was the 50a55, The two boards use different types of igniter's. The new board has a dip switch that needs to be adjusted for the old type 50a50 igniter & I am not sure the new igniter's are compatible with the old boards (something was stated about a time delay or igniter warm-up period) If all else fails, replace both the board and igniter. Even with touching it or high gas pressure the igniter should not fail instantly!
If all else fails get professional help!
|
| Zzz
| "Re(1):Problem burning up igniters" , posted Sun 12 Nov 10:15
This is a shot in the dark but two things come to mind 1)gas pressure. 2) Has the bracket been changed putting the ignitor in front of the center of the burner, it should be off to one side a bit.
|
| Louis L
| "Re(1):Problem burning up igniters" , posted Sat 14 Oct 21:30
Dust period it causes hot spots - I'll bet your filters are nearly as dirty as my bathroom (hich my wife refuses to enter.
Also, the duct sirectly above it mau havethe lice combed from last years's Santa's beard!
|
| comfortairtech
| "Re(1):Problem burning up igniters" , posted Thu 22 Jun 23:21
Serviced a six year old Trane 80% furnace November 2005. Changed ignitor that lasted 1 month. Second ignitor lasted 1 week. Installed third ignitor with new circuit board. Technical support advised that circuit board intermittently was probably sending wrong voltage to ignitor and causing premature failure.
|
| Weber
| "Re(1):Problem burning up igniters" , posted Wed 10 May 22:25
Hot surface ign are very sensitve to oils, so try not to touch or handle the electrode, check to make sur you have the right voltage ign
Steve Weber
|
| | chaumontbuilder
| "Re(2):Problem burning up igniters" , posted Sun 24 Dec 21:10
Weber,
Just to let you know. the hot surface ignitors anr not that sensitive. You can touch them all you want. you can even submerge them in water. The only thing about touching them is leaving dirt on them. this will insulate that spot on the ignitor and cause the hot spot. I am not trying to sound like a know it all, that I am not. But I was under the same belief until someone showed me different.
New in the game. thanks for all the help.
|
| evildberg
| "Re(1):Problem burning up igniters" , posted Tue 21 Feb 11:06
Are you saying that you have hot surface ignition in this furnace? If so has the voltage to the ignitor that is in this furnace been tested and measured to what it is rated for? Do you have the wrong voltage ignitor in the furnace? If it is the correct ignitor and correct voltage, you may have a fan that is way out of balance causing vibration that will also cause ignitors to go bad.
Union Pipefitter (service) Minneapolis MN local 539
|
| | vapourman
| "Re(2):Problem burning up igniters" , posted Tue 27 Nov 21:54
we had repeat failures on a carrier and it was poor ignition caused by debrise in the copper gas line connected to the valve. The tech would change the igniter since it was open and watch it glow and fire then leave. But if you watched it 5 or 6 times it would have trouble sensing the flame due to marginal gas pressure.
|
|
|
