Trane RLY2138 Relay 322838-752 If either reading is outside

If either reading is outside the 6% tolerance range

it will lockout

Attempting to bush it down or modify the hub is not recommended as it will throw off the balance and risk damaging the motor bearings

System Protection: Acts as a primary furnace safety switch to prevent overheating and potential structural damage to the heat exchanger

It features a 23mA current draw and a mid-point ground for safety and ignition stability

Trane RLY2138 Relay 322838-752 If either reading is outsideThe Trane RLY2138 Relay is an essential OEM industrial grade component for precise 24V HVAC control. This robust 1NO 1NC relay (normally open normally closed) is engineered for switching high current loads in Trane air handlers, furnaces, and light commercial packaged units. Featuring high conductivity silver cadmium oxide contacts, the RLY2138 is rated for up to 25A at 277 VAC, providing reliable SPST performance with a 7FLA 42LRA inductive rating.