Viessmann 7855596 Radial Fan 319848-301 Using a non-OEM wheel can

Using a non-OEM wheel can lead to pressure switch trips or internal damage to the heat exchanger due to improper venting

What is the purpose of a normally open valve in a gas train

this OEM replacement harness ensures stable voltage delivery and signal integrity

if power is present but the status LED is dark

protecting the heat exchanger from thermal stress during heavy heating cycles

Viessmann 7855596 Radial Fan 319848-301 Using a non-OEM wheel canThe Viessmann 7855596 Radial Fan is a precision engineered OEM replacement part designed for Vitodens 100 W B1HA and B1KA series condensing boilers. As a critical NRG118 combustion blower, this component features a high durability die cast aluminum housing and a steel impeller, specifically balanced to maintain the exact air fuel ratio required for efficient premix combustion. Whether you are servicing a B1HA 26 35 or B1KA 26 35 residential wall