Is this a bad thermal ignitor? 9 flashes - http://www.hvacmechanic.com/ Forums

Original message

bstoff

63.65.185.210

"Is this a bad thermal ignitor? 9 flashes" , posted Thu 6 Nov 11:16

Working on a Trane XR 90. When thermostat kicks on, the blower runs but furnace does not ignite even after 10 or so minutes of running. The alert light flashes 9 times....indicating bad thermal ignitor. Other issue, the blower does not turn off via thermostat switch or power switch, it just keeps running until I turn off main circuit switch. 4 year old unit. What can be done? Thanks.

-Bill

Replies:

Houston204

98.196.66.53

"Re(1):Is this a bad thermal ignitor? 9 flash" , posted Thu 6 Nov 20:56

Are you sure it isn't open inducer limit switch?

"Tip of the Day" Remember to remove power first.

bstoff

71.125.134.37

"Re(2):Is this a bad thermal ignitor? 9 flash" , posted Thu 6 Nov 21:14

Inside the door on my chart, it tells me that 9 flashes are to check the thermal ignitor. Its a Trane XR 90. Is this not sounding right?

-Bill

Schock Therapy

75.157.133.30

"Re(3):Is this a bad thermal ignitor? 9 flash" , posted Thu 6 Nov 21:23

If that is what the error code indicates based on the sticker on your unit, then that is probably what it is. Ignitor failures are commonplace. Just replace the ignitor.

It's only a shock if your not expecting it!

Houston204

98.196.66.53

"Re(4):Is this a bad thermal ignitor? 9 flash" , posted Thu 6 Nov 21:50:

The drawback of posting XR90 instead of a model number is that multiple models have that sticker.

Does the ignitor appear damaged?

Turn off the stat and then remove power to your furnace.
Restore power to the furnace.
This should reset an ignitor error.
Give the stat a heat demand and observe your furnace starting sequence.

Induced draft motor runs.

The ignitor glows red.

The gas valve clicks and burners ignite.

After a warm up period the blower runs.

"Tip of the Day" Remember to remove power first.

[this message was edited by Houston204 on Thu 6 Nov 21:58]