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Type: Posts; User: mechcon

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  1. Answers
    2
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    4,132

    There is also a humi connection on the board to...

    There is also a humi connection on the board to make this easier.
  2. The y at the board should have 2 wires on it 1...

    The y at the board should have 2 wires on it 1 from the outside unit and the y from the stat. The other wire from the outside unit should go to common in your case it is the com24.
  3. Answers
    3
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    430

    Hi When the fan is going on and off does the...

    Hi When the fan is going on and off does the call for heat (check for 24 volts from W to C) Stay or go off also?
  4. Answers
    2
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    595

    Try cleaning the flame sensor .Should be located...

    Try cleaning the flame sensor .Should be located in front of the burners with the ignitior( the one that glows when trying to start)on one side and the flame sensor on the other ( with one wire...
  5. Start by checking for a call for heat from the...

    Start by checking for a call for heat from the stat if no call for heat venter will not start . If you have a call for heat check for power at venter . Power at venter could mean a bad venter or...
  6. The symptoms given say no power to board. I have...

    The symptoms given say no power to board. I have seen the clips that hold the door switch in break off and the switch not stay made or switches just go bad.. The n8mpn uses a fan control board not a...
  7. Answers
    2
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    1,003

    The limit switch is a safety device. Why did it...

    The limit switch is a safety device. Why did it go bad if the furnace is running correctly the limit should never be used yours has been used so many times the limit failed. You need the look...
  8. Answers
    1
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    506

    Your problem sounds like a air flow issue dirty...

    Your problem sounds like a air flow issue dirty filter,blocked vents, blower not working,A coil blocked something is causing the unit to overheat and go off on limit..
  9. Answers
    5
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    1,994

    Hi is the jumper that the tech put in still...

    Hi is the jumper that the tech put in still intact. when the furnace goes off were does the power stop at board, door switch,on off switch on furnace or breaker.
  10. One of the wires go to C on the board And the...

    One of the wires go to C on the board
    And the other goes to Y on the board with the Y from the stat.
  11. That furnace is rated for a max of 3 tons of...

    That furnace is rated for a max of 3 tons of cooling.
  12. Sounds like the blower motor is bad . Check for...

    Sounds like the blower motor is bad . Check for power to motor. Power to motor but motor not running the usual diagnoses is bad blower motor.
  13. Answers
    2
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    1,002

    Hi with the thermostat turned to heat and set...

    Hi with the thermostat turned to heat and set high enough to call for heat . What happens. Is there 24 volts when you when you use a elect tester on the W and C terminals.
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