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Amana air command 90 model ghn90a35
once in a while on ignition the furnace is makeing a rumbing sound.
most of the time when it happens is in the morning after the furnace has been off for a while.
flame sensor has been cleaned
other than that the furnace works great but i cant figure out what the intermitant noise is.
any suggestions would greatly be appreciated.
Thanks
Johnny
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Instructions. This manual is to be used by qualified HVAC technicians only. Amana .... Gas Furnace Upflow/Horizontal Induced Draft A Air Command 80 SSE.
Most likely one of two issues is occurring. Either the inducer fan is not providing enough draft because it is either spinning too slowly or the impeller is damaged, or the pressure switch that the inducer motor air flow is supposed to activate is not operating properly. If the pressure switch fails to activate, the furnace will not open the gas valve and fire the ignition believing that there is not sufficient draft the vent the combustion gases.
In the path of the flame on the last burner that starts, there will be a small rod. That rod is the flame sensor. Take a scrub pad and polish it. Also check the electrical connection that goes back to the circuit board. Disconnect any ground wire from the circuit board to furnace cabinet, sand it and replace it.
water should never reach the nipple for the pressure switch tubing on the IDM. Check the entire condensate drain system for obstructions. Verify water makes it from the furnace location to the outside drain. Flush p-traps and any anti-siphon devices thoroughly.
You said, Amana Air Command 80, 20 years old. Electronic ignition. Furnace does not start. Good power to furnace. Thermostat properly set. Where do I start looking?
Sounds like you possibly have one or more bad jets if the unit is a gas furnace! Let me know how it goes. Huuum
WOW, listen to this story! I understand you are looking for the solution to fix your furnace your self. But I want to tell you my story about my smart wife and our furnace. When we moved into this house the furnace was 20 years old and she suggested that we put a new one that it will save us money. I laughed at her and replied if it's not broken why fix it! Six years later it finally broke down and I replaced the whole furnace and central air unit with a new one. Our utility bill went down $100 dollars a month! That's $7200. that I lost over 6 years due to not respecting my wife's power of reasoning! If you can afford it or can get financing replace any unit 20 years old and it will pay for it self. Can you imaging $1200. a year for 20 years is $24,000 dollars I'm saving with a new and efficient unit. Do the math!!!!!!!!!
Thank You, Huuum, Hope I gave you some good fatherly advice. Please remember to leave a rating
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