Atwood 8535 III furnace problem?
'95 Damon Intruder. Furnace just quit working, blower ran, no ignition. Motor replaced last year, worked 2 months through Winter O.K. Tested O.K October. Replaced sail switch with 'replacement no.' ...
Forum Discussion
donfrump wrote:enblethen wrote:
The only "air flow sensor" is the sail switch.
Opening outside access door should have no effect on air flow through air chamber.
No ignition could be a grounded electrode conductor pinched in the door or damaged in such a way that it grounds to the door.
boy surely if it was that simple the OP would see that right away?
no? yes? beats me.In my view removing outside cover could improve the air flow
It is improving the air flow........but it's the combustion air flow that is being improved NOT the room air flow
OP stated:
blower runs, no ignition, tries to ignite, shuts off, repeats
Tries to ignite........it is sparking but main flame doesn't light (no ignition)
Intake air restricted OR the spark electrode is not positioned correctly and the improved air flow moves the 'spark'
