Carrier HH18HA420 Limit Switch 318973-401 the 5H0581080004 is the current

the 5H0581080004 is the current official manufacturer replacement for the discontinued 5H58108-4 part number

this prefilter is built to withstand repeated washings without compromising structural integrity

This float-type vent must be installed in a vertical position

8 and 600 seconds to meet specific manufacturer anti-short cycle requirements

Carrier HH18HA420 Limit Switch 318973-401 the 5H0581080004 is the currentThe Carrier HH18HA420 Auto Limit Switch is a critical HVAC safety device designed to monitor internal furnace temperatures and protect the heat exchanger from thermal stress. This OEM Carrier replacement part operates with a fixed 90 120F temperature range, ensuring the burner cycles off if the unit exceeds safe operating parameters. As a precision calibrated 90 120 degree limit switch, it features an automatic reset function that restores continuity