An AC’s contactor is what controls the flow of power (electricity) to all of the components necessary for your unit to work. A faulty, failing or broken contactor can result in your AC’s ability to properly cool your residence or business, and can even result in the unit running non-stop (even if your thermostat is turned to ‘off’).
Signs of a Bad AC Contactor
The most common sign is deterioration, known in the industry as ‘pitting’. This type of damage can occur under extreme heat or high voltage. When pitted, a contactor will often ‘stick’, resulting in a non-stop flow of power to the unit.
Other Indications of a Bad Contactor Include:
Can a Contactor Be Repaired?
A pitted contactor cannot be repaired, but the coil in the contactor CAN be replaced. That said, replacement of a coil is often not worth the cost of labor and parts, and more often than not, replacement of the entire contactor is advised.
Replacement of the contactor is a fairly simple and affordable solution that can be carried out by a handyman or licensed HVAC contractor.