Warmflow

Utility HE 21

Regular 21kW 2014-present ErP A 20 fault codes

<p>The Utility HE 21 is a combi boiler from Warmflow, available at 21kW output. Produced 2014-present.</p>

Utility HE 21 Fault Codes 20

Code Description Severity Type

E1 Ignition Lockout The burner has failed to ignite after the start sequence. High Engineer View Guide

E10 Fan Fault Fan not operating correctly. High Engineer View Guide

E11 APS Fault Air pressure switch fault. High Engineer View Guide

E12 Condensate Blocked Condensate drain blocked. Medium DIY View Guide

E13 Diverter Fault Valve stuck. Medium Engineer View Guide

E14 Gas Valve Fault Gas valve not responding. High Engineer View Guide

E15 Combustion Fault Air/fuel outside limits. High Engineer View Guide

E16 PCB Fault Internal error. High Engineer View Guide

E17 Pressure Sensor Fault Sensor faulty. Medium Engineer View Guide

E18 Rapid Temperature Rise Flow temp rising too fast. High Engineer View Guide

E19 Frost Protection Frost protection running. Medium DIY View Guide

E2 Flame Failure The flame has been lost during operation. High Engineer View Guide

E20 Outdoor Sensor Outdoor sensor faulty. Low Engineer View Guide

E3 Overheat Lockout The boiler has exceeded safe temperature. High Engineer View Guide

E4 Low Water Pressure System pressure is too low. Low DIY View Guide

E5 Flow Sensor Fault The flow temperature sensor has a fault. Medium Engineer View Guide

E6 Return Sensor Fault The return temperature sensor has a fault. Medium Engineer View Guide

E7 Pump Fault The pump is not operating correctly. High Engineer View Guide

E8 PCB Fault Internal PCB error. High Engineer View Guide

E9 DHW Sensor Fault Hot water sensor faulty. Medium Engineer View Guide