Can I reset my Slant/Fin boiler to clear the DHW Flow Fault code?

You can reset once if your manual says it's safe. If the code returns, stop resetting — repeated resets on a genuine fault, especially gas or overheat faults, can be unsafe and may worsen the problem. Book a licensed repair instead.

Is the DHW Flow Fault fault dangerous?

It's not usually an immediate safety emergency, but it should be diagnosed to prevent further damage and restore reliable operation.

How much does it cost to fix a Slant/Fin DHW Flow Fault fault?

Cost depends on the underlying cause — some causes (like low pressure or a dirty sensor) are minor, while others (like a gas valve or control board) cost more. We diagnose first and give you a clear price before any repair.

Slant/Fin Error Code

Slant/Fin Error Code DHW Flow Fault

A hot-water flow or flow-sensor fault on the domestic hot water side.

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If your Slant/Fin combi boiler is showing error code DHW Flow Fault, here's what it means: A hot-water flow or flow-sensor fault on the domestic hot water side. This is a moderate fault. The boiler may keep running intermittently, but it should be diagnosed soon to prevent further damage.

Slant/Fin boilers report faults using error codes on the vhs victory combi and chs wall-hung display. Knowing the code helps a technician arrive prepared with the right parts, which usually means a faster, lower-cost repair.

What causes the DHW Flow Fault code?

Error DHW Flow Fault on a Slant/Fin boiler is most commonly caused by one of the following:

Low water pressure
Clogged flow sensor or inlet filter
Faulty flow turbine

What you can safely check first

Note the exact code and your boiler's model number
Check the pressure gauge — low pressure triggers many faults
Confirm the gas supply is on and other gas appliances work
Reset the boiler once, per the manual, only if it's safe to do so
If the code returns, stop and call a licensed technician

Why this needs a licensed technician

Resolving a DHW Flow Fault fault almost always involves the gas, combustion, sensor or pressurized side of the appliance. Under BC's Safety Standards Act, that work must be performed by a licensed gas fitter — and doing it correctly protects your warranty and your safety. We diagnose Slant/Fin boilers, carry common parts, and verify clean combustion before returning your boiler to service.

This is not a DIY repair

Combi boilers are gas-fired appliances regulated under the BC Safety Standards Act. Opening the unit, touching the gas valve, or working on the flue without a valid BC gas-fitter licence is both unsafe and illegal. Diagnosing the fault is helpful — fixing it should always be left to a certified technician.

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Frequently Asked Questions

Other Slant/Fin codes & help

Slant/Fin Ignition FailureThe boiler failed to establish a flame and locked out.Slant/Fin Flame LossThe flame was detected then lost during operation.Slant/Fin Overheat / High LimitWater temperature exceeded the safe limit.Slant/Fin Low Water PressureSystem pressure is below the minimum.Slant/Fin Supply Sensor FaultThe supply temperature sensor reads open or short.All Slant/Fin Error CodesFull list

Fix Your Slant/Fin DHW Flow Fault Fault

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