noises

[MasterPlumbersKeymaster]

i have gas heating.when my furnace goes on it sounds like metal screeching for about 3-5 seconds.and i’ve also noticed the furnace goes on alot in a 1/2 span.any ideas

thanks

[AKPlumberParticipant]

Sounds like maybe the combustion motor is going bad or needs lubrication/cinching down/adjustment. Or the squirrel cage.

[SelgasParticipant]

Depends a lot I guess on what brand, model of unit you have there as well as the drive system for the room air fan motor. I suspect this one has a belt drive and that the belt is stretched some and slipping under loadup which would make the very noise you refer to. If the fan does not run at thr right speed it can make the heater cycle on and off at short intervals by operating the overheat device instead of the thermnostat. Best you get a serviceman to check this unit over and make sure it is set up correctly.

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Selgas Services Ltd
Craftsman Gasfitters, Plumbers, Electrical Service Technicians

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