Belimo UGLK1872 Retrofit Kit 318172-701 the logic chip or onboard

the logic chip or onboard relay has likely failed

replacing the worn component with this genuine Viessmann boiler part restores factory-spec reliability and prevents unnecessary lockouts

some models in the 35-65 series feature field-selectable line voltage for 120/240V ignitor options

Frequent tripping is often a symptom of restricted system airflow

Belimo UGLK1872 Retrofit Kit 318172-701 the logic chip or onboardThe Belimo UGLK1872 Retrofit Kit is a heavy duty linkage solution engineered specifically for Honeywell V5011 and V5013 globe valves in the 4 inch to 6 inch range. Designed for dual mount actuator configurations, this kit allows technicians to field mount tandem Belimo rotary actuatorsincluding the AFB, NFB, and GMB seriesto existing valve bodies without breaking the line. The UGLK1872 linkage utilizes a robust rack and pinion construction to convert