A customer brought in this classic Defy glass top hob after it started throwing a major tantrum in the kitchen. One of the radial plates was acting up—either refusing to heat up at all or stuck on maximum heat, completely ignoring the dial control settings.
<em style="display: block; font-size: 12px; color: #666666; margin-top: 5px;">Caption: Opening up the chassis to test the internal wiring and regulators.</em>
The Fix: Swapping the Siebe Regulator & Testing the Radial Plate
</h2>
<p style="font-size: 15px; margin-bottom: 15px;">
Once the glass top was safely off, I traced the circuits back to the control switches. The radial heating plate itself was still drawing steady resistance, but the real culprit was a faulty, worn-out Siebe regulator switch behind the control dial. Over the years, the internal bi-metal contacts degrade, causing them to weld shut or lose contact entirely. I stripped out the old switch, wired in a fresh OEM replacement, and reassembled the unit. The radial element now cycles perfectly across all heat levels.
<em style="display: block; font-size: 12px; color: #666666; margin-top: 5px;">Caption: Fully rebuilt, polished, and ready to head back to the client's kitchen.</em>
Want practical diagnostic tips, honest repair vs. buy advice, and a heads-up on how to save your appliances from local power surges sent straight to your inbox?
👉 <a href="mailto:highpoint52@gmail.com://gmail.com me to the Newsletter" style="color: #4A5D4E; text-decoration: underline;">Click here to drop me an email and subscribe!</a>