Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.
If our community has helped you, please consider making a contribution to support this website. Thanks!

Much less exhaust steam - Carrier 58MTA 80,000 BTU

Options
Kube1989
Kube1989 Member Posts: 3
in Gas Heating

Noticed suddenly far less steam out the exhaust. Cleaned Blower, new capacitor, new limit switch on burner box…no improvement. I opened up inducer assembly and cleaned flat disc impeller & all vacuum ports and lines. Pressure switches operating as should.

Tried new control board- same results. I snaked both the intake and exhaust- no clogs.

When it was running, I "helped" the intake with aiming shopvac (on the blowing side) at the intake and steam started rolling.

Is it possible bad windings on inducer motor that is enough to close pressure switches but not enough RPM to vent properly? OR… is it more likely a bad secondary heat exchanger? I tried the long match in the primary with blower running and there was no dancing flame.

Just need the best suggestion (if I can avoid buying a new furnace). Thanks!!!

Comments

  • mattmia2
    mattmia2 Member Posts: 16,117

    is it a modulating furnace or just single or 2 stage?

    what do you get when you clock the meter?

  • Kube1989
    Kube1989 Member Posts: 3

    It's a 2-stage

    I have not clocked the meter- and you might have to explain that… :-)

    Thanks!

  • mattmia2
    mattmia2 Member Posts: 16,117

    look at @Tim McElwain 's response in this thread:

    https://forum.heatinghelp.com/discussion/163822/clocking-a-natural-gas-meter
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 19,941

    You need to define what problem you are having b4 shooting the parts cannon that will not fix anything.

    You seeing less steam in the exhaust? is that you problem? How is it heating?

    mattmia2
  • Kube1989
    Kube1989 Member Posts: 3

    Struggling to keep house above 62…slightly funny smell. When I had plenty of steam- house was warm.

    Less steam- house cold. no real budget to do a new full replacement- not many parts left to replace

    Taking hours to raise he house temp 8 degrees.

  • mattmia2
    mattmia2 Member Posts: 16,117

    is it firing at the proper rate?

Categories