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Honeywell PC8900

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Glenn Harrison
Glenn Harrison Member Posts: 405
in THE MAIN WALL
Try going to this website:

<a href="http://hbctechlit.honeywell.com/" target="_blank">Honeywell Technical Literature</a>


Enter PC8900 and a list of available service and install literature will pop up that should have the info you need.

I beleive that you have to ohm out the outdoor sensor using a chart that states what resistance there should be based on the outdoor temp. You will more than likely find either a weak connection in the sensor wiring or an inaccurate sensor.
Glenn Harrison, Residential Service Tech

Althoff Industries Inc. Mechanical and Electrical Contractors

Crystal Lake, Illinois

<a href="http://www.althoffind.com" target="_blank">Althoff Industries website</a>

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  • jack_4
    jack_4 Member Posts: 43
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    Outside Temp Question

    I've been all over the Honeywell site and can not find the answer to my question.

    When the outside temp is read and displayed on the Honeywell PC8900, how accurate is the reading? Is it +- 1 degree, or better?

    If the complaint is that it is off, how can it be checked?

    I assume that it is not adjustable, correct?
  • jack_4
    jack_4 Member Posts: 43
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    Good question

    Did you ask the rep?
  • Glenn Harrison
    Glenn Harrison Member Posts: 405
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    Honeywell Technical Literature

    Try going to this website:

    Honeywell Technical Literature


    Enter PC8900 and a list of available service and install literature will pop up that should have the info you need.

    I beleive that you have to ohm out the outdoor sensor using a chart that states what resistance there should be based on the outdoor temp. You will more than likely find either a weak connection in the sensor wiring or an inaccurate sensor.

    Glenn Harrison, Residential Service Tech

    Althoff Industries Inc. Mechanical and Electrical Contractors

    Crystal Lake, Illinois

    Althoff Industries website
  • jack_4
    jack_4 Member Posts: 43
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    Thanx!

    Thank you, I had not found that access to the tech documents.

    I book marked it.

    Thanx!
  • Glenn Harrison
    Glenn Harrison Member Posts: 405
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    Your welcome, and good luck. (nm)

    Glenn Harrison, Residential Service Tech

    Althoff Industries Inc. Mechanical and Electrical Contractors

    Crystal Lake, Illinois

    Althoff Industries website
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