Armstrong Air Ultra V Tech 80


  #1  
Old 10-30-10, 09:54 AM
D
Member
Thread Starter
Join Date: Oct 2010
Location: USA
Posts: 2
Upvotes: 0
Received 0 Upvotes on 0 Posts
Armstrong Air Ultra V Tech 80

Gives me a code of Pressure switch open w/inducer on. Any thoughts as to what it might be. The ignighter won't get hot, the fan will come on when you switch over to fan only, but won't fire up.
 
  #2  
Old 10-30-10, 10:34 AM
SeattlePioneer's Avatar
Banned. Rule And/Or Policy Violation
Join Date: Jul 2007
Location: Seattle, Wa
Posts: 4,469
Upvotes: 0
Received 1 Upvote on 1 Post
95% of the time when the inducer motor is on and the pressure switch wont close, the reason is a defect in the venting system, a defective inducer fan or something plugged up in the furnace.

The easy thing to do is to replace the pressure switch, and 95% of the time that does nothing.

I'd inspect the venting system for something plugging it up, then remove and inspect the inducer motor fan and then inspect the heat exchanger of the furnace for plugging of one kind or another.

Another earlt thing to check is the condition of the tubing to the pressure switch which can be cracked, worn or disconnected, and the nipple on the furnace the tubing fits on, which can be plugged with debris.

If you are able to do that, 95% of the time you will find the problem. But the problems can be subtle and hard for a DIYer (or even a repairman who isn't especially competent) to identify.
 
  #3  
Old 10-30-10, 11:08 AM
D
Member
Thread Starter
Join Date: Oct 2010
Location: USA
Posts: 2
Upvotes: 0
Received 0 Upvotes on 0 Posts
Thanks, Had the installer out, only4 years old. The codensation drain for AC plugged up and drained H2O down onto the computer board, and fried it. At the time the code was to put a P trap in that drain, which isn't needed, and got plugged. Should be under warrenty, and going to redue drain.
 
 

Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description:
Your question will be posted in: