A.O. Smith 9006280015 Blower Proving Switch

The A.O. Smith 9006280015 Blower Proving Switch is a safety part that ensures that a gas-fired appliance, for example, a furnace or boiler cannot be operated in the event of blower motor failure or improper operation. This switch is normally fitted in the gas supply line to the appliance in question. During the start of the appliance, the switch checks the performance of the blower motor. If the motor does not start or run for a certain period, the switch will cut off the gas supply to the appliance to minimize the production of hazardous combustion products.