42139199 Genuine O-Ring Seal for the Heater and Diverter Assembly in Electrolux Group Dishwashers, Leak Repair Sealing Ring

Part 42139199 is the genuine O-ring seal for the heater and diverter assembly used in Electrolux group dishwashers. In these machines the water heating and the switching of water between spray arms are combined in one assembly, and this ring seals that assembly where it joins the rest of the water circuit. No model list is held for the seal. Confirm by comparing your old O-ring, the number on the heater and diverter assembly, or your model and PNC.

Leaking dishwasher heater or diverter joint

Rubber O-rings harden, flatten and crack after years of hot water and detergent. When the seal on the heater and diverter assembly lets go, water can drip from under the dishwasher, set off the anti-flood protection or leave a puddle on the floor after a cycle. Leaks often show up after the assembly has been removed for a repair, as an old ring rarely seals properly a second time. Replacing the O-ring whenever the assembly is disturbed is cheap insurance against a slow leak.

Part details

• Genuine Electrolux group part 42139199
• O-ring seal for the dishwasher heater and diverter assembly
• Worth fitting new whenever the assembly is removed
• No model list or size on file

Replacing the O-ring

Turn the dishwasher off at the wall and close the tap. Expect water in the sump when the assembly comes apart, so lay towels down first. Clean the groove and mating surface thoroughly, as grit or old residue will cause a leak. A smear of water on the new ring helps it seat without rolling. Run a cycle and check underneath for drips.

Questions about this part

Should I replace the O-ring when I change the heater?

Yes, it's good practice. An O-ring that has been compressed for years usually won't reseal reliably once disturbed, so fitting a fresh 42139199 when the heater and diverter assembly comes out helps avoid a leak later.