How To Troubleshoot A Bad Sequencer With Power Off? - HVAC - DIY Chatroom Home Improvement Forum

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


Thread Tools Display Modes
Old 02-29-2012, 03:09 AM   #1
Join Date: Feb 2012
Posts: 1
Rewards Points: 10

How to troubleshoot a bad sequencer with power off?

I think i have a bad sequencer because my heat blower will not cut off after i turn it off. So to troubleshoot it with power off, should i read 0volts ac with the power off because it should be in the open position when the blower is supposedly off? It might be stuck on i think.


garteaga is offline   Reply With Quote
Old 02-29-2012, 04:20 AM   #2
An old Tradesmen
Join Date: Oct 2008
Location: Somewhere
Posts: 34,592
Rewards Points: 8,170

With the power off. You'll read 0 volts weather its good or bad.


beenthere is offline   Reply With Quote
Old 02-29-2012, 07:29 AM   #3
Hvac Pro
yuri's Avatar
Join Date: Nov 2008
Location: Winnipeg, Canada
Posts: 16,124
Rewards Points: 386

no power = no volts.

use an ohm meter and disconnect the wires on the terminal of the sequencer for the fan. if closed it will read 0 ohms if open then infinity. lots of the time when you bump or touch or move sequencers the switch will open. some brands of elec furnaces use a 24 or 240 volt fan relay so that may be the problem.
"Cut it twice and it is still too short".
yuri is offline   Reply With Quote

Thread Tools
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
Power strip hack salex Electrical 3 01-31-2012 06:10 AM
Solar at the cottage? Tito1800 Home Theater 2 01-18-2012 02:30 PM
Wring for Lincoln Power Mig Welder vstoyko Electrical 17 01-15-2009 06:15 PM
safe way to add extension to power cord sil Electrical 7 10-18-2007 09:58 PM
Partial power on same fuse! joyjam Electrical 5 07-10-2005 10:23 PM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1