|
Posted by Gerald Newton on January 25, 2007, 3:10 pm
> I have two forced air furnaces...I have a gas one in the house, and
> an old oil burner I use to heat my shop in the backyard. The other day I
> was close to my gas furnace in the house and heard some squeaking as the
> fan was turning. On inspection I found that the allan screws had become
> loose holding down the drive pulley and the pulleys had become out of
> alignment causing the belt to squeak. It was a simple fix, tap the pulley
> back in place and tighten the screws.
> This brings to mind a question. If the furnace threw a belt during
> it's heating cycle, would it not crater the heat exchanger? Like...there
> is no air going through it, and the motor would be still running so the
> furnace would think everything is fine, right? Is there a thermostat to
> kick the burners off in the event the heat exchanger reaches a critical
> temperature in case something like this happens? Thanks for any
> replies...Jim
Some hot air furnaces use a air flow switch for this. It is a switch
mounted on the air plenum with a little flat piece of metal inside the
plenum.
| 
Yahoo! 
Google 
Windows Live 
del.icio.us 
digg 
Netscape 
XML Sitemap