Ask Me Help Desk

Ask Me Help Desk (https://www.askmehelpdesk.com/forum.php)
-   Heating & Air Conditioning (https://www.askmehelpdesk.com/forumdisplay.php?f=150)
-   -   Intertherm mmhb 056 electric ignition furnace (https://www.askmehelpdesk.com/showthread.php?t=400407)

  • Sep 27, 2009, 03:54 PM
    nkolber
    Intertherm mmhb 056 electric ignition furnace
    Getting flashing light two times-indicates that control ion lockout due to signal not received by control that inducer pressure switch not closed n time, please help! p.s recently replaced ignightor and thermostat
  • Sep 27, 2009, 06:13 PM
    T-Top
    If it's a 90% furnace make sure the condensate drain is clear. Check for restrictions in the vent pipe.
  • Sep 27, 2009, 06:36 PM
    nkolber

    Where is the drain?
  • Sep 27, 2009, 06:55 PM
    T-Top
    Is your furnace vented with metal vent or pvc pipe?
  • Sep 27, 2009, 07:00 PM
    nkolber

    Metal, it's a mobile home, checked vent on roof, does not seem to be blocked
  • Sep 27, 2009, 09:53 PM
    hvac1000
    See wiring diagram PAGE 1 on below doc. You do not have a pressure switch in that unit you have a Centrifugal Switch built into the small combustion motor/blower. This unit is a Direct Combustion burner style.

    NOTE: if this unit is on LP Gas and you do not know what you are doing I highly suggest you call a professional that does. With LP gas these babies go BANG if you try and jumper out the centrifugal switch for testing purposes.

    If using Natural gas it is not quite as bad but still will go bang. Just a friendly warning. The switches do stick in these small combustion motors.

    http://www.centraltrailer.com/resour....mm_wiring.pdf

  • All times are GMT -7. The time now is 07:28 AM.