An E250 code typically indicates an open limit or rollout circuit

you ensure that the heater operates at its rated 10" W

It does not feature a thermometer window or a setpoint dial opening

Can I use this orifice for a natural gas system

Honeywell 14004236-001 Coupler An E250 code typically indicatesThe Honeywell 14004236 001 Coupler is a critical mechanical interface designed for MP918 Series pneumatic damper actuators. Engineered to facilitate a precise connection between the actuator shaft and a 5 16 inch pushrod, this high grade pushrod adapter ensures reliable torque transfer and linear motion in commercial HVAC air handling systems. As a veteran grade actuator shaft coupler, it is purpose built to withstand the mechanical stresses of