Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > HVAC

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 09-15-2009, 09:29 PM   #1
Newbie
 
Join Date: Sep 2009
Posts: 1
Share |
Default

Bryant 350MAV fan won't turn on


I'm working on a Bryant 350 MAV, 2001 year model, combined gas furnace and split AC system w/ separate electronic air cleaner. System sat unused for approximately 5 months (spring to summer in Los Angeles -- warm to hot). AC then operated properly for 1 day. The following day, AC was turned on, external unit cycled continuously throughout the day but the home was not cooled; inspection at the end of the day revealed that the blower fan was not operating. The LED did not show any error codes (LED constant on). 3 amp fuse is visibly intact; removing the fuse causes fuse error code to flash. Motor turns easily. Powering up the system with the thermostat fan switch set to ON causes a single audible relay click; the power light on the air filter (which is downstream of the control board and blower unit) comes on, but the blower does not operate. Replacing the run capacitor on the blower motor had no effect. I pulled the blower fan and purchased a replacement motor (same voltage, speeds, etc. as OEM) and matching capacitor from Grainger. As a test, I hooked the replacement motor up to the control board without installing it in the squirrel cage. Powering up the system with the thermostat fan switch set to ON and depressing the door switch caused the same symptoms as before (a single relay click sound; the power light on the air filter comes on; the blower motor does not turn). All wire connections are visibly intact. I suspect that the control board is bad (the control board model is identical to that shown at Blower Fan Won't Come On). Any suggestions would be greatly appreciated.

Doodle owner is offline   Reply With Quote
Old 09-15-2009, 09:35 PM   #2
GC/Master Plumber/Mech
 
Join Date: Feb 2009
Location: Hays, KS
Posts: 1,467
Default

Bryant 350MAV fan won't turn on


Time to get a DVOM and check to see if the control board is send power to the blower motor. Check both a/c and heat.

__________________
John Wayne once said "Life is tough and it is even tougher if you are stupid"

Tempstar and Trane Dealer
Plumber101 is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Fan and A/C unit won't turn on cadmanim HVAC 1 06-22-2009 02:49 PM
Pilot light button on furnace won't turn whydonchathen HVAC 5 10-05-2008 11:03 PM
Furnace w Cooling unit wont turn off Klatimer HVAC 2 09-19-2008 08:35 PM
Faucet won't turn off etiger Plumbing 1 08-31-2005 02:46 AM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.