Vaillant 193590 Ignition cable

The Vaillant 193590 is an ignition cable for Vaillant gas-fired heating appliances. It carries the high-voltage supply from the ignition unit to the spark electrode, generating the spark that lights the burner during start-up. The lead is supplied as a single replacement cable for servicing and fault repair, and is fitted in place of the original item when the existing lead breaks down.

• The appliance fails to ignite, with no spark visible at the electrode
• Repeated lockouts on start-up that clear after a reset
• Intermittent ignition, particularly in damp or cold conditions
• Cracked, brittle or scorched insulation along the lead
• Spark tracking along the cable instead of at the electrode tip
• A loose or corroded terminal at either end of the lead

• Confirm the number 193590 against the marking on the existing cable or the appliance data plate.
• Check the appliance model and serial number, as Vaillant uses different ignition leads across its ranges.
• Inspect the spark electrode and its sealing washer at the same time; a worn electrode can produce symptoms that look like a cable fault.
• Route the replacement lead clear of hot surfaces and sharp edges when fitting.
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.