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Posted by Zyp on October 30, 2007, 5:26 pm
sjr wrote:
> Hi! I have a problem w/my Carrier Weathermaker 9000? (it's a 58MXA)
> not heating.
>
> Though the "component test" checks out OK, this is the ONLY time that
> I see that I see the HSI energized (the ignitor). Also, the test of
> the pressure switch in the op's manual (i.e., disconnect the inducer
> motor, call for heat, and make sure that the HSI is NOT glowing after
> about a minute) was fine.
>
> I see a steady ~26VAC signal to the pressure switch.
>
> Other checks:
>
> - air intake/exhaust not clogged (good flow when inducer runs)
> - inducer motor supply voltage fine (>120VAC)
> - inducer cap fine (3.0 uF and resistance huge @ DC)
> - install was years ago so PVC sizing must be right
> - no backup of water in the drain system
> - no clogging of the other rubber/plastic tubing (from the pressure
> switch to the burner box)
>
> So am I at a point where the board is in question or might it still be
> the pressure switch?
>
> I've tried shorting across the terminals, but an HVAC tech has
> informed me that not doing it at the proper time or with the
> connections previously ok (i.e., apparently you can't just disconnect
> the leads and short the terminals) won't show the proper behavior.
>
> ???
> HELP!
>
> Thanks
Why not call a local HVAC service tech. Is it snowing outside? Do you live
in Bum-f**k Egypt? Can the local HVAC service tech. make it to your home
without trouble? Why monkey with something you clearly don't understand and
end up making it worse? A qualified CARRIER service tech., can fix your
problem with parts off his service truck and be on his way in less than and
hour. I don't see why you're not hiring a qualified serivce tech to fix
one of the single most expensive appliances in your home? [And the most
dangerous I might add as well.]
--
Zyp
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