Can this be used with ammonia

including models RN-013

Always match the motor part number against your heater's nameplate data for exact fitment

What is the difference between the 0342692 and the older 335 models

If the switch remains open while cool

Carrier HH22UC033 T-Stat R-410A Can this be used withThe Carrier HH22UC033 is a heavy duty single pole double throw (SPDT) thermostat designed for high voltage HVAC applications requiring precise defrost termination or temperature control. Specifically engineered for 240V and 277V circuits, this bimetal snap action switch features fixed setpoints with an open at 15F and a close at 35F. This specific calibration ensures reliable cycle management in commercial refrigeration and air conditioning systems