GE & Hotpoint Gas Cooktop Control Knob Assembly Parts — Models & Compatibility

If your GE or Hotpoint gas cooktop knob won't stay on, spins freely without engaging the valve, or has cracked plastic that makes temperature control impossible, you're looking at a control knob assembly failure. This hub covers the WB03X29354 replacement knob assembly—the direct factory replacement that fits most PGP series gas cooktops from the mid-2010s forward.

Is This the Right Part for Your Model?

Your model number is stamped on a metal plate, usually located along the front edge of the cooktop under the front burner grates, or on the underside if you lift the top panel. Look for model numbers starting with PGP—this part specifically fits PGP7030, PGP7036, PGP9030, and PGP9036 series cooktops in stainless steel, black, and white finishes. The knob assembly includes the dial, indicator markings, and internal valve engagement mechanism.

About This Replacement Part

The WB03X29354 is a complete control knob assembly designed for GE and Hotpoint professional-style gas cooktops. Unlike basic knobs that just press onto a D-shaft, this assembly includes the precision valve control mechanism that regulates gas flow from simmer to high. The most common failure happens when the internal plastic teeth that grip the valve stem wear down—you'll notice the knob spinning past the stop points or refusing to turn the burner completely off. Another frequent issue is heat damage to the front face, where the black finish bubbles or the indicator lines fade from years of cooking heat. This replacement restores precise flame control and includes fresh markings so you can actually see your temperature settings again.

Compatible Model Series

This knob assembly works across GE's PGP professional gas cooktop line, including both 30-inch and 36-inch models. If your cooktop has continuous grates and sealed burners with a stainless steel surface, chances are this is your part. The assembly supersedes several older part numbers including AP6327766, PS12296156, and 4585908, so if you're finding those numbers in your manual, this WB03X29354 is the current replacement.

Installation Overview

Replacing a cooktop control knob assembly takes about 5 minutes per knob and requires no tools. Pull the old knob straight off the valve stem—if it's stuck from grease buildup, wiggle it side-to-side while pulling. Clean the valve stem with a degreaser before installing the new knob. Align the D-shaped opening in the new knob with the flat sides of the valve stem, then press firmly until it seats completely. Test by turning through the full range from Off to High and back—you should feel distinct clicks at each position.

Why This Part Fails

Control knob assemblies fail for three main reasons. First, the plastic valve engagement teeth wear down from thousands of rotations—every time you adjust a burner, those internal teeth take friction. Second, heat exposure from the burners below causes the plastic housing to become brittle over time, especially if you frequently use high heat. Third, grease and moisture work their way into the knob mechanism during cleaning, degrading the internal components. If you've been wiping down your cooktop with the knobs installed, you've probably pushed cleaning solution into the valve stem area, which accelerates wear. The good news is the replacement process is straightforward, and new knobs restore that solid, precise feeling you remember from when the cooktop was new.