Customer Support 7 days a week

Welcome Guest! To enable all features please Login or Register.

Notification

Icon
Error

New Topic Post Reply
Options
Go to last post Go to first unread
Dr_Zoidberg57  
#1 Posted : Saturday, November 16, 2013 5:26:15 PM(UTC)
Quote
Dr_Zoidberg57

Rank: Member

Groups: Registered
Joined: 1/30/2010(UTC)
Posts: 16

29 year old furnace was working fine until this morning. The circuit board was replaced just 4 years ago, thanks to info from here. I opened the top part of the furnace and checked to make sure there was power. Then, I checked to see if the fan was free spinning and it was. When I pushed on the door power switch, I can hear the relay on the circuit board clicking. I checked the the voltage going to the motor and it fluctuated between 20.0 and 0.00 volts? Also after unplugging the motor from the circuit board leads, the buzzing/humming noise seems to be coming from a small transformer just below the circuit control board. It's never made that noise before. I checked it's output and it 25 volts, which is what it says it should be on the schematic (115 to 24 volts). I'm guessing that if it's putting out the correct voltage that it's also getting the correct voltage coming in. So does that leaves the board itself?


Thank you very much.
Sponsor
See inside of your appliance - diagrams and part photos for virtually every model.

powered by AppliancePartsPros.com
 
Dr_Zoidberg57  
#2 Posted : Monday, November 18, 2013 11:55:07 AM(UTC)
Quote
Dr_Zoidberg57

Rank: Member

Groups: Registered
Joined: 1/30/2010(UTC)
Posts: 16

Decided I was in over my head and called in a HVAC technician. It was a bad pilot switch. Problem solved.
Quick Reply Show Quick Reply
Users browsing this topic
New Topic Post Reply
Forum Jump  
You can post new topics in this forum.
You can reply to topics in this forum.
You can delete your posts in this forum.
You can edit your posts in this forum.
You cannot create polls in this forum.
You can vote in polls in this forum.