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One heating vent makes a different noise than all the others?
I have a forced hot air system. All of my heating vents (except one) make a steady hissing sound during a warming cycle. However, one of them makes a sputtering noise. Is this anything to be concerned with? Perhaps, I need to have an escape valve replaced? They all seem to work fine warming the house. I don't want to call a repair service for no good reason.
check all the dampers and make sure the wing nuts are tight, most codes say the dampers must be located within 2 feet of the main duct
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