When diagnosing a tripped rollout limit switch

Key Benefits Precise Compatibility: Engineered specifically for use with KH8 and KH10 universal crank arms

For top or bottom mounting

not a hot surface ignitor (HSI)

this part ensures compatibility without the need for additional adapters

Williams P024200 Transformer When diagnosing a tripped rolloutWhen you're out in the field and the control board loses its signal, the Williams P024200 Transformer is the OEM HVAC replacement part you need to restore functionality. This step down transformer is specifically engineered for Williams Forsaire counterflow furnaces and top vent heaters, converting a 120V primary input to a stable 24V secondary output. With a 20VA power rating, it provides the clean, low voltage power required for thermostats,