For contractors requiring a dependable solution for low-pressure monitoring

Standard installations require the sensing bulb to be insulated against ambient air to ensure accurate temperature readings from the suction line

keeping this HVAC high temperature cutout in your service truck ensures you can resolve airflow or overheating issues on the first call without guesswork on limit switch compatibility

Does the 1F78-144 require a C-wire

Johnson Controls T-3311-2 Pneumatic Thermostat Refrigerant For contractors requiring a dependablePneumatic Thermostat and Valve Actuator, Direct Acting at 20 Psig, Reverse Acting at 15 Psig, Remote Bulb, External Setpoint Adjustment, Valve Top Mounting, Dual Temperature, Dual Pressure This item is not qualified for free shipping.