Gas and Oil Home Heating Furnaces - Induction mortor test
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AP365
08-24-04, 10:40 AM
My furnace is seven years old Carrier, model 58WAV.
When the heater is turned on, the induction motor run in ten second and stop. A little later, it try to run again and stop.
The led code status is 31. It says pressure, draft safeguard, or auxiliary limit switch (when used) did not close. And check for low induction voltage, defective induction motor, defective pressure switch, obstructive pressure tubing and inadequate combustion air supply.
A friend of mine suggested to take electric line of the induction motor off the Control board and connect the induction motor to the other electric venue in order to find out if this motor was not defective. This motor run well in this way.
When I checked the induction motor, however, with the digital Mutimeter, the meter for the resistance turned 440 from 1000.
Is this motor good or not? The control board should be changed? Or any othe problems? The pressure switch and tube seem to be fine, although I don't have any idea how to check the limit switch.
I would appreciate your opinions.
When the heater is turned on, the induction motor run in ten second and stop. A little later, it try to run again and stop.
The led code status is 31. It says pressure, draft safeguard, or auxiliary limit switch (when used) did not close. And check for low induction voltage, defective induction motor, defective pressure switch, obstructive pressure tubing and inadequate combustion air supply.
A friend of mine suggested to take electric line of the induction motor off the Control board and connect the induction motor to the other electric venue in order to find out if this motor was not defective. This motor run well in this way.
When I checked the induction motor, however, with the digital Mutimeter, the meter for the resistance turned 440 from 1000.
Is this motor good or not? The control board should be changed? Or any othe problems? The pressure switch and tube seem to be fine, although I don't have any idea how to check the limit switch.
I would appreciate your opinions.
mattison
08-24-04, 11:03 AM
If the motor runs fine when you plug it in direct I doubt it's bad. You need to get a meter on there to see if the voltage to the motor is dropping off from the board when it stops. You could have condesate or dirt in the plastic tube leading to the proover switch.