Carrier Weathermaker 2900. Approx 4 years old.
I noticed the blower wasn't working when thermostat kicked in. Went to
basement, opened machine. things appear fine, but per service-sheet there is
no light coming from LED.
Tested with VMeter for ~110 at L1/L2 and 24 VAC at S1 S2. All checks out.
(although the xformer seems to buzz slightly, but I guess that could be
Fuse looks good 2. Even with service-switch closed, I can't get LED to come
on. (although it did come on once for me, but I can't seem to repeat that...
anyway... does it appear that I have to go spend $200 on a new "hk32fz011
PCB for this unit?... grrrr.. way 2 much $$ for that part....
Does anyone know of any component-level issues that can cause this sort of
failure... as I would prefer to replace that part obviously...
(althogh if the DIAG-piece is busted, it could be the main ICs that are
fried, and thats the end of that...)
Is the PCB the problem for sure? (obviously I don't want to spend $200 on a
part that isn't the problem...)
[ should I pull*all*
the wires OFF and try to run it with just the
power-feed attached to trully isolate the problem, or is that not worth
Any assistance/insight for a HVAC newbie would be much appreciated.
thanks -- MikeE