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Precise Pressure Sensing: Calibrated specifically for the BTH-400 blower assembly to ensure accurate airflow verification
Post-Burnout Cleanup: Specifically formulated to remove organic acids and sludge after a catastrophic compressor failure
Test the thermopile millivolt output with a multimeter while the pilot is lit
Using an appliance regulator in a 2 PSI line without an overpressure protection device violates ANSI Z21
Carrier HH18HA130 Limit Switch 322838-754 Precise Pressure Sensing: Calibrated specificallyThe Carrier HH18HA130 is a high precision, OEM auto limit switch designed for critical thermal regulation within residential and light commercial HVAC systems. This disc type temperature actuated switch features a specific operating range of 100 130F, functioning as a primary safety mechanism to prevent heat exchanger damage and ensure efficient blower motor cycling. As a direct replacement for the HH18HA130B, this component maintains strict 1 2" NPT
