What H8 Means
WHICH MACHINES THIS APPLIES TO: H8 is printed only for the gas models in the TLS752 XXL family - the TLS752GXXL and the TLS752 GXXLRR. There is also an H8 on the Asko WL6511 washing machine, where it means something entirely different, so a code seen on a washer should never be read off this page.
WHAT H8 MEANS: the TLS752 XXL operating instructions list H8 under gas models as "Igniter and flame detector problem". The printed instruction is to contact customer care. Asko gives no owner check.
WHY TWO COMPONENTS SHARE ONE CODE: they are two halves of the same sequence. The igniter heats up to light the gas, and the flame detector confirms that the gas actually lit. The control cannot always tell which half failed from the outside, because both failures look identical to it: the sequence started and no confirmed flame followed. That is why the code names both.
WHAT THE MACHINE DOES: it shuts the gas off and stops. It does not retry indefinitely, and it does not continue on the assumption that the flame will arrive. That behaviour is the point of the interlock.
WHAT AN OWNER USUALLY NOTICES FIRST: the drum turns, the machine sounds normal, and the load stays cold and wet. A gas dryer that has lost ignition tumbles perfectly well; the only outward sign is that nothing ever gets warm.
WHY THIS PAGE CARRIES A HIGHER SEVERITY: the code concerns the ignition and flame-proving chain on a gas appliance. The machine has already stopped correctly, and keeping it stopped is the right thing to do until someone qualified has been.
HOW THE MACHINE TELLS YOU: the family reports errors by buzzing for ten seconds every ten minutes, and the display clears on a power cycle. Clearing the display changes nothing about the fault.
CLASSIFICATION: fault on a gas appliance, with no published owner procedure.
Common Causes of H8
- Igniter failed, cracked or no longer reaching temperature
- Flame detector failed or out of position
- Gas not reaching the burner, so no flame follows a correct ignition attempt
- Wiring or connector in the ignition circuit
- Control board fault on the ignition and flame-proving circuit
🔧 One Safe Check You Can Try
There is nothing here to attempt and this page will not invent something. Stop using the dryer, switch it off at the wall or the breaker, and close the gas shut-off valve on the supply line to the machine if you can reach the handle without moving the appliance or touching any fitting. Leave it closed until the machine has been looked at. If you smell gas at any point, do not operate any switch, leave the building, and call the gas utility emergency line from outside before calling about the dryer. Do not run the machine again to see whether it lights this time: a machine that has stopped on an ignition and flame-proving fault has stopped on the exact circuit that decides whether gas keeps flowing, and repeated attempts are the wrong way to investigate it. Do not open the lower front panel or the back. The igniter, the burner and the flame detector sit together in a compartment that also carries the gas connection and the mains supply, and the igniter itself is a brittle component that breaks when handled. When you book the visit, say the machine is gas and that it is reporting an ignition and flame detection fault, because that determines who is sent and what they bring.
⚠ Why You Shouldn't Go Further Than That
- The igniter, the burner and the flame detector share a compartment with the gas connection and the mains supply, which is not an enclosure to open even with the power off.
- The igniter is brittle and commonly breaks when it is handled, which turns an inspection into a part replacement.
- A fault on the flame-proving chain of a gas appliance is exactly the kind that should not be investigated by running the appliance repeatedly.
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.