while the universal design means one coil fits all valve sizes in the 200RB series

this SPST wall mount thermostat provides reliable temperature regulation between 45°F and 75°F

By offloading the airflow setpoint directly to the relay

Ideal for HVAC zoning systems requiring precision

Carrier EF17BZ242 Reversing Valve L99H008 while the universal design meansWhen you are troubleshooting a heat pump that refuses to switch between modes, the Carrier EF17BZ242 Reversing Valve is the field ready solution for restoring refrigerant flow control. This 4 way reversing valve is the direct engineering replacement for legacy models EF17BG240 and EF17BG245, ensuring a precise fit without the need for extensive manifold modifications. Utilizing a reliable solenoid actuated slide mechanism, this OEM Carrier part