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the MK4-3121 is field-serviceable
You can gently use a fine abrasive cloth to remove carbon buildup from the tip
Industrial Duty Cycle: The ASCO RedHat design is a field-proven standard for long-term reliability in commercial car washes
Versatile Application: Suitable for both gradual modulation and standard two-position air damper applications
and filter out wax
Lochinvar & A.O. Smith 100278134 Control 318423-701 the MK4-3121 is field-serviceableThe Lochinvar & A. O. Smith 100278134 Control is a critical OEM User Interface Control board engineered for precise system management in high efficiency condensing boilers. As a direct replacement for legacy part numbers RLY20136K, RLY20136, and 100189277, this Boiler Control Board provides the necessary digital interface for real time monitoring and adjustment of combustion parameters. This HVAC Replacement Part is a standard component in the
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