If it's oil canning the duct work (which is usually that type of sound...pressurizing and depressurizing with the fan) you need to locate the weak point and reinforce it.
why the blower is running all the time and never shut off?
My furnace will light and run, but when it shuts off the pilot light always goes out, how can I fix this?
What is wrong with my furnace when it ignites and then shuts off?
The furnace cycles and runs fine but the blower does not shut off and keeps blowing cold air. What do I do?
Why does the pilot light go out when my furnace kicks off?
My gas furnace comes on at 4° below the set temperature on the thermostat. Is this a thermostat issue?
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