For increased requirements

Featuring a 48Y frame (5-5/8 inch diameter) and standard counter-clockwise rotation (shaft end)

it meets rigorous factory standards for safety and performance

30-second inter-purge

Carrier HH680618 Safety Switch 323613-751 For increased requirementsWhen you're dealing with a system shutdown related to flue gas backup or excessive heat in the blower housing, the Carrier HH680618 230F M R Vent Safety Switch is the specific high limit control required for a proper repair. This secondary limit switch is engineered to interrupt the 24V control circuit if vent temperatures hit the 230 degree Fahrenheit threshold, protecting the heat exchanger and surrounding components from thermal damage. As a manual