The blower on my OLD forced air natural gas house heater will keep
running. Oddly, if I just gently tap the sheet metal housing next to
the blower, it stops running? Is the fan limit switch getting stuck?
Actually there are typically two switches in that assembly. The limit
switch to turn off the burner if temps go past set-point, the fan
to control fan relative to furnace temp. Some have two adjustments-
obviously you want the one that's got markings in a reasonable range
for discharge temp. If they're still visible.
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.