[johnny wen]

Sister said burn smell coming on when heat on. She has had it on already for couple weeks since it has been cold
SPLIT system

Im going to look into the blower motor and check
How do I check amp? which wire?
does the 10+ old motor need oiling? can that cause this?

Thank

[kelvin30]

I suggest you, You have to contact an Air conditioner dealer for this problem.
If you are interested then i know a dealer name who deals about this problem. For more information you can contact that Air Conditioner Dealer

[mark norder]

in reply to your question, I dont think you have a problem with the blower motor, and they are permanently lubricated - each season the gas burner and heat exchanger should be cleaned out * disassembled and cleaned with a brush and use compressed air to blow out burners, combustion area, and inside and outside the heat exchanger, being careful not to break the ignitor.
if you are not comfortable doing the cleaning, a local service co. should be able to do it for their basic service call.

dust on the outside of the heat exchanger is what you are smelling, each time burner heats, it burns the dust on the metal surface, which gets forced into the house by the blower. - i assume it gas, but if not, its the same problem, dust needs cleaned from the heat exchanger. hope this helps, echofreez

[mark norder]

Mr. Bates : yes, clearly you are not an expert, i simply provided information to be more aware of what needed to be done, - if a service co. is used, someone would know if they were being taken advantage of, just trying to assist,..... 35 + years in HVAC and commercial refrigeration - iam an expert. thank you for your concern.

[smithwatson50]

It might be the sequencer not allowing the blower to kick on.I had a similar problem. If you don't how how to check the amp..I would suggest you to call a tech. Really I mean it,this thing is dangerous and may cause you injuries.
Follow these tips to preliminary check which doesn't involve any danger.
Heating, Ventilation and Air Conditioning Home: How to Take Care of Your furnace?

[mark norder]

to : smith watson -clearly another expert..... start the furnace and let it run, if there is a burning smell from the registers, shut it off , remove the front cover, check if the motor is overheating, check for heavy dust on burner box area or if its electric, AND it does have a sequencer, check for burned wiring at sequencers or heating elements. anything else would mean a cracked heat exchanger, and that would mean replacing the whole funace. - no hazards, no danger......... just common sense.