Diagnostic: air handler had a burning smell throughout the house appears as if there was a power surge. Breakers were triped at the pannel multiple burnt wire on in the unit itself. Heat kit did not have continuity on one of the limit switches indicating it is bad. Motor was ohm out and had good reading. System is old recommended replacement options as well and replacing the. Heat kit. Sequencer, breaker and some high voltage wires that got burnt up. Called multiple supply stores and it will take 3-5 days to get the parts here once ordered.