What H5 Means
WHICH MACHINES THIS APPLIES TO: the Asko WL6511XXLW, WL6511XXLT and WL6532 XXL. These sit on a bought-in platform rather than on the Asko WM control, and the H-series belongs to them alone. The same letters appear on other Asko appliances meaning different things - H2 on a TL751 dryer is a drying temperature sensor and H2 on a wine cabinet is a zone humidity sensor - so an H-code is only ever read against the machine it appeared on. The source is the service manual for the model, confirmed from the WL6511XXLW document.
HOW THESE MACHINES REPORT A FAULT: all the indicator lights go out, the code blinks in the display, the buzzer sounds for ten seconds every ten minutes, and the display clears when the machine is switched off and on again. Clearing the display is not the same as clearing the problem.
WHAT H5 MEANS: the service manual gives it as a water temperature error specific to the wool and delicate course, with the trigger defined as the water temperature in that course reaching 113 degrees Fahrenheit, which is 45 degrees Celsius, or higher.
WHY A SEPARATE THRESHOLD FOR WOOL AND DELICATES: because those programs exist to protect fabrics that heat damages. Wool felts and shrinks irreversibly above a fairly low temperature, and the delicate cycle is built around keeping the water cool as much as around gentle movement. Forty-five degrees is warm to the hand and already too warm for those fabrics, so the machine watches that limit on those programs and on no others.
WHAT THIS CODE PROTECTS: the laundry rather than the machine. Nothing here is a hazard to the appliance, which is why the threshold is far lower than the general overheating limit on the same platform.
HOW THE WATER GETS TOO WARM ON A COOL PROGRAM: the heater may be receiving a command it should not, the control may be misjudging the temperature, or the sensor may be reading high. A supply arriving unusually warm can also contribute on a machine plumbed somewhere it shares a run with hot pipework.
WHAT AN OWNER MAY NOTICE FIRST, AND IT IS OFTEN THE EXPENSIVE WAY: a wool item that has come out smaller or felted after a cycle that was supposed to be cool.
CLASSIFICATION: problem, on the temperature control, reported against the programs where temperature matters most.
Common Causes of H5
- Heater being energised on a program where it should not be
- Control misjudging the temperature on the wool and delicate course
- Washing temperature sensor reading high
- Heater relay not switching off cleanly
- Incoming water arriving unusually warm
🔧 One Safe Check You Can Try
There is no owner repair for this and no published check, but there are two useful things to do. First, stop running wool and delicate programs on the machine until it has been looked at, and wash anything heat-sensitive elsewhere; the code is telling you the one thing those programs are supposed to guarantee is not being guaranteed. Ordinary warm programs are not what this code is about, so the machine is not necessarily unusable for everything. Second, gather the detail that separates the possibilities. Note whether the code appears on every wool or delicate cycle or only sometimes, whether anything has come out of recent cool washes warmer than it went in, and whether the general overheating code has ever appeared alongside it. Note too whether the inlet hose runs alongside hot pipework or through a warm space, because water arriving already warm shortens the distance to the limit. Write it down before clearing the display, since a power cycle clears it. Then leave the heater, its relay and the sensor alone - all of them are inside the cabinet around a spring-suspended drum at mains potential.
⚠ Why You Shouldn't Go Further Than That
- The heater, its relay and the temperature sensor are inside the cabinet around a spring-suspended drum, at mains potential whenever the machine is connected to power.
- The threshold in the manual is a measurement taken by a technician on an isolated, instrumented machine, so there is nothing an owner can check against it.
- Continuing to run wool and delicate loads to see whether it repeats risks the laundry the program exists to protect.
Opening a panel to inspect or repair something yourself doesn't automatically cancel your manufacturer's warranty — but it can risk accidental damage, and some manufacturers do have specific service conditions. Check your product's warranty terms, or ask us, before deciding.