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A manual reset is a safety design feature
the unit features an all-steel case and is rated for a 525 Psig maximum overpressure
Always match the 4uF rating specified by Reznor
The sensor sends continuous feedback to the control board
Carrier HH19ZH175 Limit Switch 340793-762 A manual reset is aAs a field tech, you know that a failed safety circuit is the fastest way to a no heat call. The Carrier HH19ZH175 is a critical furnace high limit switch designed to protect the heat exchanger from thermal stress. This 175F limit switch features a normally closed (CO) configuration, meaning it stays shut during standard operation and opens the circuit at its 175 degree setpoint to kill the gas valve or heating elements. This specific HH19ZH175
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