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Old 03-25-2011, 07:07 PM   #16
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Goodman GMNT 080-4 inducer problem


Sounds like a cracked heat exchanger. Turn the stat up so it runs, watch the flames, see if they change when the blower comes on.

Voltage is allowed to be plus or minus 10% of rated voltage. Rated at 115 volts, 104 to 126 is acceptable.

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Old 03-25-2011, 11:58 PM   #17
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Goodman GMNT 080-4 inducer problem


if the crack were big enough to cause the inducer to fail, then the pressure switch would most likely catch that and not allow the unit to fire.
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Old 03-26-2011, 02:37 AM   #18
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Goodman GMNT 080-4 inducer problem


It's a strange problem when the diagnostic's on the board are not giving you an indication of pressure drop that a failing inducer motor should give you
I would be looking for a connection or a line feed related to the inducer that is poor. Your voltage could be OK but an amp restriction due to a poor connection or a nearly severed line would explain the quick motor burnouts.
Oh and by the way... The company your tech worked for makes all the other heating companies in my area look good.
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Old 03-26-2011, 03:47 AM   #19
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Goodman GMNT 080-4 inducer problem


Quote:
Originally Posted by hvactech126 View Post
if the crack were big enough to cause the inducer to fail, then the pressure switch would most likely catch that and not allow the unit to fire.
Small cracks, or popped crimp rings often don't effect the pressure enough to keep the pressure switch from opening.


Recently replaced the inducer on a GUN, when the blower came on, the inducer changed noise. Middle cell was cracked. But the inducer was able to keep enough negative pressure that the switch stayed closed.

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