H0034001009B Genuine Pressure Switch for Haier Washing Machines, Washer Water Level Sensing Switch

H0034001009B is a genuine Haier pressure switch, the water level sensing switch used in Haier washing machines. A small air tube runs from the bottom of the tub to the switch, and as the water rises the trapped air pressure tells the control when the right level is reached. Haier offers this switch in several letter versions, so make sure the B suffix matches your old switch or parts list.

Haier washer overfilling or not filling properly

A faulty pressure switch confuses the washer about how much water is in the tub. Common symptoms are a machine that keeps filling until water comes out the overflow, one that stops filling too early and washes with too little water, or one that sits on fill and never starts agitating. You may also see a water level error code. Before replacing the switch, check the air tube for kinks, splits or a blockage of lint, and blow gently through it to make sure it's clear.

Part details

• Genuine Haier part number H0034001009B
• Water level pressure switch
• For Haier washing machines
• Senses tub water level through an air tube

Replacing the pressure switch

Switch off at the wall and unplug the washer, then turn the taps off. Find the switch, usually under the top panel or control console, and photograph the plug and tube before disconnecting them. Unscrew the old switch, fit the new one and push the air tube fully onto its spigot. Run a short cycle to check the machine fills to the correct level and stops.

Questions about this part

Can a blocked air tube mimic a faulty switch?

Yes. A kinked, split or blocked tube gives the switch a false reading, causing the same filling problems as a failed switch. Check the tube and the air chamber at the tub before you replace H0034001009B.