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Most likely the noise is coming from the small draft inducer motor.They are notorious for this.
Turn thermostat to call for heat, Then go to furnace and tell me if the noise starts immediately BEFORE igniter,burners or main circulating blower start.
You will need to replace the little inducer motor.Is this something you will do yourself or hire done?
Ignore phone off.THat is site generated offer
THe issue is this little motor. THey are known for high pitched sounds and screeching. Often a contractor will say he doesn't hear anything unusual as he hears them many times a week as he service the units,.Explain that it may not bother most people but it does you and ask him to replace it.It is nothing to be terrified of because there are many safeties on the furnace should it fail but I do understand the aggrevation on hearing it.
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Little motor is probably less than a hundred bucks wholesale.
11 Oct 2019, 8:22 AM
Been a licensed hvac contractor since 1989 and in the industry sine 1974.I hated these little motors when they first started using them.Customers complained of both the high pitch noises and rocket sounds of the burners ever since the time they came to be.