How to Fix Uneven Heating on a GE Radiant Cooktop PP975SM3SS? Common Causes and Troubleshooting Guide
August 14, 2026
Uneven heating on a GE PP975SM3SS radiant cooktop, where a pan shows hot spots and cold spots instead of heating evenly, is most often caused by a warped or uneven cookware base, which is worth ruling out before assuming the cooktop itself has failed. If a good, flat pan still heats unevenly, the next most likely causes are residue trapped under the glass, a partially degraded radiant element, or a loose electrical connection, and all three are checkable without a service call.
What's Really Causing the Uneven Heat?
1. Warped or Uneven Cookware Base
A pan base that is not perfectly flat leaves small gaps between the pan and the glass, and even a slight bow of a millimeter or two is enough to noticeably reduce contact and create hot spots. This is the single most common cause of perceived uneven heating and often is not obvious just by looking at the pan.
2. Debris or Residue Trapped Under the Glass
Burned-on spills or buildup on the glass surface, or in some cases just underneath the pan's contact area, act as an insulating layer that changes how heat transfers from the element. This produces a consistent hot or cold pattern that shows up regardless of which pan you use.
3. Partially Failed Radiant Element
Elements can degrade unevenly rather than failing outright. A section of the internal coil can wear faster than the rest from years of use, which means the element still glows and appears to work but no longer distributes heat consistently across its surface.
4. Element Not Sitting Flush in Its Housing
If an element has shifted, warped slightly, or was not reseated correctly during a prior repair, it can sit at a slight angle or with an uneven gap beneath the glass, which changes how evenly heat reaches the surface above it.
5. Loose or Corroded Electrical Connector
A weak connection at the element's wiring can reduce and destabilize the power reaching it without cutting it off completely, producing inconsistent heat output that can look and feel like uneven heating rather than a full failure.
How to Diagnose and Fix GE Radiant Cooktop PP975SM3SS Uneven Heating
Tools You'll Need
-
A flat-bottomed pan you know performs well, plus a straightedge to check for warping
-
Ceramic cooktop cleaner and a plastic scraper, never abrasive pads
-
Infrared thermometer, if available, for mapping surface temperature
-
Phillips and flathead screwdrivers
-
Replacement radiant element
Safety Notes
Let the cooktop fully cool before cleaning the glass or handling any element. Disconnect power at the circuit breaker before removing an element or accessing wiring underneath the cooktop. Never use abrasive pads or metal scrapers on the glass, since they can scratch the surface even when the power is off.
Diagnostic Table
| What You're Seeing | Likely Cause | Go To |
|---|---|---|
| Hot spots move or disappear with a different pan | Warped or uneven cookware base | Step 1 |
| Uneven heat pattern stays the same across different pans | Residue trapped under the glass | Step 2 |
| Element glows evenly but heat output still feels inconsistent | Partially failed radiant element | Step 3 |
| Visible gap or wobble where the element sits in its housing | Element not sitting flush | Step 4 |
| Heat feels weak or inconsistent even with a good pan and clean glass | Loose or corroded connector | Step 5 |
Step 1: Rule Out the Cookware First
Lay a straightedge across the bottom of the pan to check for warping. Even a small bow is enough to cause the issue. Test the same zone with a different pan you know sits flat and heats evenly elsewhere. If the hot spots follow the pan rather than staying in the same place on the cooktop, the cookware is the cause, not the appliance.
Step 2: Clean the Glass Surface Thoroughly
With the cooktop off and cool, use a ceramic cooktop cleaner and a plastic scraper to remove any burned-on residue from the glass, paying particular attention to the area directly over the affected zone. Wipe the surface fully clean and dry, then retest with a known-good pan.
Step 3: Test and Replace the Radiant Element
-
Disconnect power at the breaker.
-
With a flat pan confirmed and the glass confirmed clean, run the zone at a medium setting and use an infrared thermometer, if available, to map the surface temperature after a few minutes.
-
A healthy element should hold a fairly consistent temperature across its surface. Noticeable hot and cold zones point to a degrading element.
-
Remove the affected element from its mounting clips or screws per your installation manual.
-
Install the correctly sized replacement element.
-
Reconnect the wiring harness, secure the element in its mounting position, and restore power before testing again.
Step 4: Reseat the Element in Its Housing
With power disconnected, visually inspect how the element sits in its mounting position. Check for any visible gap, tilt, or looseness compared to the other zones on the cooktop. Reseat it fully and securely in its housing, making sure it sits flush and level before restoring power.
Step 5: Inspect and Reseat the Wire Connector
With power disconnected at the breaker, access the underside wiring and locate the connector for the affected element. Unplug it, check for corrosion or discoloration on the pins, clean lightly if needed, and reseat it firmly. Replace the connector or element if the damage looks significant rather than just reseating it.
