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Carrier Infinity gas valve rapid cycle on shutoff

mulsco Member Posts: 3
I have a carrier infinity furnace that is working fine, but at the end of the cycle the gas valve flutters when it shuts off. It sounds like its clicking on and off 6 to 8 times in 2 seconds. Ideas?


  • Tim McElwain
    Tim McElwain Member Posts: 4,480
    What is the Make and Model of the gas valve? What is the Model number of the Infinity?
  • mulsco
    mulsco Member Posts: 3
    I was misspoken....the guy that put it in said it was the same as an infinity, its a bryant 355mav furnace. I cant see a make on the gas valve, there are some numbers on the solenoid but i dont think thats what youre looking for...
  • ratio
    ratio Member Posts: 2,923
    Is it mechanical or electrical in origin? Watch the power to the valve when it's chattering, if it's coming in and out too, then it must be a control issue, if the control voltage is constant it's mechanical or gas pressure related. I'd put the coil of a 24 volt relay across the valve & watch that, a digital meter might not respond fast enough to show the fluctuations. The manual for that model you mentioned shows the high heat stage runs through a pressure switch, maybe that is fluttering.
  • mulsco
    mulsco Member Posts: 3
    Good ideas....I'll check those out.