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Rhreem Power Vent 2 works for about 5 minutes and then seems to over heat
I have a Rheem Power
Vent 2 40 gallon water heater. It was new with the home and is now
about 11 or 12 years old now. Friday the blower motor stopped working
and would only buzz and would do the 4 flash error code.
For a while I was about to get it work for about 5 minutes. burner
would fire and blower would work and then very suddenly, after about 5
minutes of working, the motor would sound like it was wining, where it
was still running but something was stopping it. When this occurs the
vent stops pushing air out of course and gets hot and the motor seems to
Because the temp, pressure/vacuum switch, and blower are in
the same device I replaced the unit, part #sp12562. While installing
the new unit we ran a snake through the vent from both directions and
there was nothing clogging the vent.
Installed the new unit let it run and checked it an hour or 2
later and the same issue. Blower motor buzzing when attempting to start
and is very hot when issue occurs. 4 Flash error code.
for blower to cool and kicked off the process again, runs for 5 minutes
then blower motors starts whining and gets hot and eventually shuts
down sometime buzzing like it's trying to start the motor but can't.
Checked the element, removed the plate element fires correctly
flame is blue the entire time including when the blower starts
We removed the temp sensor (putting tape over the whole during test) same symptoms.
Checked outlet is 120v and the blue wire #8 gets 120v the entire time.
power vent and pulled up metal deflector in the center of unit as far
as I could everything looks normal. There was a little corrosion near
the top, but nothing excessive.
Checked the vacuum tube, it's clean no clogs.
this water heater has been in my house for 11 or 12 years and there
have been no major changes to my home. I'm wondering if there might be
anything else to look for to help resolve.