Wayne R Lombard , IL December 23, 2016 Bad heater coil in through the wall a/c heater unit Got new coil. I've done this repair before, but the best thing was AppliancePartsPros.com is a great site. Easy to order and the part was shipped in good time. Super pricing too. They are a great resource. Read More... Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes Tools: Screwdrivers, Socket Set