Useful advice,
minus the waffle.
Fault-finding, buying and maintenance guides drawn from real commercial pressure washer work.
Why a Kärcher HDS keeps switching on and off
How to tell normal trigger-controlled stopping from rapid cycling caused by water starvation, leaks, the nozzle, overflow valve or pressure-switch system.
PUMP SERVICINGKärcher HDS pump servicing: seals, O-rings and valves
How we separate low-pressure seal, high-pressure seal, O-ring and suction-valve faults before servicing a Kärcher HDS pump.
KÄRCHER HDSKärcher HDS service light flashing: fault codes explained
What 1, 2, 3, 4, 5 and 7 flashes can mean on electronic HDS Compact machines, what to check safely and why the exact model matters.
BURNER DIAGNOSISKärcher HDS burner not starting: follow the sequence
How water flow, temperature demand, ignition, fuel and flame detection work together before an HDS produces hot water.
MODEL GUIDEKärcher HDS 10/20 repair and maintenance guide
A practical guide to pressure, burner and three-phase faults on the powerful HDS 10/20 commercial hot-water platform.
WORKSHOP GUIDEKärcher HDS 5/11 UX coil replacement, control piston and seals
Our newer-style hose-reel HDS 5/11 UX repair in photos: cover and coil access, a new heating coil, control piston and seals, plus valve checks and reassembly guidance.
FAULT FINDINGWhy a pressure washer pulses or surges
How water starvation, trapped air, worn valves, the nozzle and unloader faults create unstable pressure.
BURNER FAULTSWhite smoke from a hot pressure washer
What white diesel smoke usually tells you, why repeated restarts are risky and which observations help diagnosis.
FAULT FINDINGWhy a pressure washer loses pressure under load
A practical route through water supply, nozzle, valves, seals and unloader faults when pressure will not hold.
KÄRCHER HDSKärcher HDS burner fires then cuts out
Why an HDS burner may light once, stop during use or fail to restart after the trigger is released.
FAULT FINDINGWhy your hot pressure washer isn’t firing
The common causes behind white smoke, a clicking solenoid and a burner that refuses to light.
BUYING GUIDEHot vs cold pressure washers: which do you need?
A practical guide for garages, farms, valeters and facilities teams.
MAINTENANCEThe commercial pressure washer service checklist
What should actually be checked before a used machine is put back to work.