BoilerFaultCodesWarmhaus E19 Fault Code
The Warmhaus E19 fault code means: your boiler is struggling to detect the flow of water, which means it cannot tell if the taps are running or if it needs to heat your home.. It appears on 1 Warmhaus model in our database.
Technical description: Water flow selection with water flow meter input
What causes the Warmhaus E19 fault?
This fault occurs when the boiler's internal sensors detect that water is heating up too quickly or not flowing away from the heat exchanger fast enough. The most common reasons are a failed or blocked circulation pump, air trapped in the system, or a buildup of sludge and debris that has restricted the internal pipework. Because the heat cannot be moved into your radiators effectively, the boiler shuts down to prevent the unit from overheating.
This issue is most frequently seen at the start of autumn when the heating is turned back on after being idle all summer, which can cause the internal pump to seize.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Avoid the next call-out bill
A cover plan would handle faults like E19: no call-out fees, no surprise bills.
Affiliate links. We may earn a commission at no extra cost to you.
Warmhaus models that show the E19 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Warmhaus E19 fault code information on this page is sourced and cross-checked against the official Warmhaus service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026