How to Replace DD33-01002A Water Inlet Valve on Samsung Dishwasher — Step-by-Step

Your Samsung dishwasher isn't filling with water, or it's taking forever to start the wash cycle. You hear the dishwasher trying to fill, but nothing's happening. That clicking sound behind the lower access panel? That's your inlet valve stuck closed, and replacing the DD33-01002A is usually the fix.

What You Need Before Starting

This is a straightforward repair that most homeowners can handle in under an hour. Here's what you'll need:

• ¼-inch nut driver or socket wrench
• Phillips screwdriver
• Flathead screwdriver
• Towels and shallow pan (for water spillage)
• Needle-nose pliers
• DD33-01002A replacement valve

Estimated Time: 30-45 minutes
Difficulty: Easy to Moderate

Safety First

Unplug your dishwasher from the wall outlet or flip the circuit breaker. This is critical — the inlet valve connects directly to electrical terminals. Also, shut off the water supply line under your sink before you start. You'll find a small valve on the hot water line that feeds the dishwasher. Turn it clockwise until it stops.

Step 1: Access the Lower Front Panel

Open the dishwasher door and remove the screws securing the lower access panel at the bottom of the door frame. On most Samsung models like the DW80M9550UG/AA and DW80M9990US/AA, there are two screws on each side. Pull the panel forward and down to remove it. The inlet valve sits on the left side, connected to the water supply line coming through the cabinet.

Step 2: Disconnect Water Supply and Electrical

Place towels under the valve — there's always residual water in the line. Use your wrench to loosen the compression fitting where the supply line connects to the valve inlet. Water will drip out, so have that pan ready. Next, disconnect the electrical connector by squeezing the locking tab and pulling straight off. Take a photo of the wire harness orientation before disconnecting if you're worried about reconnecting it wrong.

Step 3: Remove the Old Inlet Valve

The valve is held in place by a metal mounting bracket secured with two screws. Remove these screws with your nut driver. Now disconnect the internal hose that runs from the valve outlet to the dishwasher tub. Squeeze the hose clamp with pliers, slide it back, and twist the hose off the valve barb. The old valve should now pull free. You might need to wiggle it slightly to clear the mounting area.

Step 4: Install the DD33-01002A Valve

Position the new DD33-01002A valve in the mounting bracket, making sure the inlet port faces the water supply line opening. The outlet barb should point toward the tub connection. Secure the bracket screws finger-tight first, then snug them down with your nut driver — don't overtighten or you'll crack the plastic valve body. Reconnect the internal hose to the outlet barb and slide the clamp back into position. Connect the wire harness until you hear it click.

Step 5: Reconnect Water Supply and Test

Thread the compression fitting back onto the valve inlet. Hand-tighten it, then give it another quarter turn with your wrench. Turn the water supply back on under the sink and check for leaks around the connection. Plug the dishwasher back in or reset the circuit breaker. Reinstall the lower access panel.

Testing After Installation

Run a short cycle and listen. You should hear water flowing into the tub within the first minute. Check under the dishwasher during the fill cycle for any leaks around your connections. If the dishwasher fills properly and you don't see water on the floor, you're done. The DD33-01002A is compatible with most Samsung premium dishwasher models including the DW80M9550US, DW80M9960UG, and DW80M9990UM series.

Frequently Asked Questions

How do I know if my inlet valve is bad or if it's a different problem?

If your dishwasher isn't filling at all but you hear a humming or clicking sound, that's typically the valve solenoid trying to open. If there's no sound at all, check your float switch first — it might be stuck in the up position. A valve that's leaking water when the dishwasher is off is definitely failed and needs replacement.

Can I use this valve on older Samsung dishwasher models?

The DD33-01002A replaces part numbers AP6240636, PS12085480, and 4545999. It's designed for the newer M-series Samsung dishwashers manufactured after 2016. Check your model number against the compatibility list — this valve won't work on older Samsung models that use different mounting configurations.

Why does my new valve click but the dishwasher still won't fill?

Check your home water pressure — it needs to be at least 20 PSI for the valve to function properly. Also verify the supply line isn't kinked and the shutoff valve under the sink is fully open. If water pressure is good, you might have a clogged inlet screen inside the valve itself. Remove the supply line and check the small mesh screen at the valve inlet for sediment buildup.