How to Replace WB03X29354 Gas Cooktop Control Knob Assembly on GE & Hotpoint Ranges — Step-by-Step

You reach for the cooktop knob to light a burner, and it either spins uselessly without catching the valve stem, pulls off in your hand, or won't turn smoothly through the ignition positions. On GE and Hotpoint gas cooktops like the PGP7030SL1SS or PGP9036SL2SS, the WB03X29354 control knob assembly handles the mechanical connection between your hand and the gas valve — when it wears out or cracks, you lose precise flame control.

What You Need Before Starting

This is one of the simplest appliance repairs you'll ever do. No tools required in most cases — the knobs are designed for pull-off removal. You'll need:

• Replacement WB03X29354 knob assembly
• Clean cloth (to wipe the valve stem)
• Mild degreaser (optional, if there's grease buildup)

Repair time: 2-5 minutes per knob
Difficulty: Beginner — Perfect first repair

Safety First

Make sure all burners are in the OFF position before you start. The cooktop doesn't need to be unplugged or disconnected from gas — you're only replacing the external knob, not touching any internal valve components. Still, it's smart to ensure good ventilation and avoid having open flames nearby while you work.

Step 1: Remove the Old Knob

Grip the knob firmly and pull straight out away from the control panel. Don't twist — just pull. Most knobs come off with moderate force. If yours is stuck from years of grease or food residue, gently wiggle it side-to-side while pulling. You might feel a slight pop as the D-shaped socket releases from the valve stem.

Step 2: Inspect and Clean the Valve Stem

With the knob removed, look at the metal valve stem protruding from the cooktop. It should be D-shaped (flat on one side). Wipe away any grease, food particles, or carbon buildup with a clean cloth. If there's stubborn residue, use a mild degreaser — but don't spray anything directly into the valve opening. A clean stem ensures your new knob seats properly and turns smoothly.

Step 3: Align the New Knob Assembly

Take your WB03X29354 knob out of the package and locate the D-shaped socket on the back. This socket has a flat side that must match the flat side of the valve stem. Hold the knob near the stem and rotate it until you can see the alignment — the flat edges should line up perfectly.

Step 4: Press the Knob Firmly Into Place

Once aligned, push the knob straight onto the valve stem until it's fully seated against the control panel surface. You should feel it click or snap into place. Give it a gentle tug — it shouldn't pull off easily. Now rotate the knob through all positions: OFF, LITE, and the flame settings. It should turn smoothly with distinct stops at each position.

Testing After Installation

Test each burner controlled by the new knob. Turn it to LITE and verify the igniter clicks and the burner lights. Rotate through low, medium, and high flame settings — the flame should adjust proportionally. Turn it back to OFF and confirm the gas flow stops completely and the flame extinguishes. If the knob feels loose or doesn't turn the valve, remove it and check the D-shaped alignment again.

Frequently Asked Questions

Will WB03X29354 fit all GE gas cooktop models?

This knob assembly is designed for specific GE and Hotpoint professional-style gas cooktops, including the PGP series like PGP7030SL1SS, PGP9036SL2SS, and related models. Check your cooktop's model number against the compatibility list — the valve stem size and knob design vary between product lines. If your current knob has the same part number or cross-references to AP6327766, you're good to go.

Why does my knob spin without turning the burner valve?

That's classic D-stem wear. The D-shaped socket inside the knob gets rounded out from years of use, so it no longer catches the flat side of the valve stem. Sometimes the valve stem itself wears down (less common). Try the new knob first — if it still spins freely, you might need a valve replacement, which requires a technician.

Can I replace just one knob or should I do all of them?

Replace what's broken. These knobs wear at different rates depending on which burners you use most. If only one is loose or cracked, swap that one. If multiple knobs feel sloppy or the markings are worn off, it makes sense to do them all at once for consistent appearance and feel. They're inexpensive enough that a full set replacement gives your cooktop a refreshed look.