GE Oven Not Heating? Diagnose and Fix (Electric & Gas)

Common Symptoms

• Oven does not heat when set to Bake — element or igniter not activating
• Oven takes far longer than normal to preheat and never reaches set temperature
• Broil works but Bake does not, or vice versa
• Gas oven igniter glows orange but the burner never lights after 90+ seconds
• Food consistently undercooked despite correct temperature setting
• F2, F3, F4, F7, or F8 error code on the display
• Bake element shows visible burn hole or blistering (electric models)

Most Likely Causes

1. 1

   Bake Element Failure (Electric — #1 Cause on Electric Models)

   On GE electric ovens (JB735SPSS, JB645RKSS, PB935YPFS), the bake element WB44X200 is the #1 cause of no-heat failures. It is a 2,500–3,000W 240V coil that visibly fails — look for a break, blister, or burn hole along the coil, most often near the terminal ends where it enters the oven back wall. A failed element reads OL on a multimeter. A healthy GE bake element WB44X200 measures 20–40 ohms between its two terminals. Replacement costs $25–$50 and takes about 15 minutes: two mounting screws, pull toward you, disconnect the spade terminals, install the new element.

2. 2

   Broil Element Failure (Electric Models)

   The GE broil element WB44X5044 is the upper coil inside the oven cavity. A failed broil element kills broil function while bake may still work. It fails the same way as the bake element — visible coil damage or OL on a multimeter. Measure across the terminals with the oven unplugged: 20–40 ohms is healthy, OL means replace. If both bake and broil fail simultaneously on a GE oven, suspect the thermal fuse or the control board rather than two independent element failures.

3. 3

   Igniter Failure (Gas Models — #1 Cause for Gas)

   GE gas ovens (JGS760SPSS, CGS750P2MS1) use hot surface igniter WB13K21 below the oven burner tube. The gas safety valve only opens when the igniter draws 3.2–3.6 amps — this amperage window is specific to GE and slightly different from Maytag/Whirlpool models (2.5–3.3A). An aging igniter glows orange but its resistance has increased and current draw drops below the 3.2A threshold, preventing valve actuation. Glow test: set the oven to Bake at 350°F and observe. The burner should light in under 90 seconds. If the igniter glows for more than 90 seconds without lighting, WB13K21 is weak and must be replaced ($25–$55).

4. 4

   Temperature Sensor Fault — GE Spec: 1,100Ω (WB21X10022)

   GE oven sensor WB21X10022 mounts at the upper-rear corner of the oven cavity. The GE-specific resistance spec is 1,100 ohms at room temperature — not 1,080Ω as on Whirlpool-platform models. Using the Whirlpool spec to test a GE sensor can cause misdiagnosis. F3 error = open sensor circuit (OL on multimeter). F4 error = shorted sensor (near-zero ohms). Both conditions prevent the control board from regulating oven temperature, causing the oven to never reach heat. Sensor WB21X10022 costs $20–$45 and takes about 20 minutes to replace.

5. 5

   Control Board Relay Failure — F2 Fire Hazard (Safety Critical)

   GE error code F2 means the oven temperature has exceeded safe limits, most commonly caused by a stuck relay on the control board keeping a heating element energized continuously. F2 on a GE oven is a fire hazard: the relay can fail in the 'on' position, running the element until a thermal cutout trips or, at worst, causing a fire. If F2 displays, UNPLUG THE OVEN IMMEDIATELY. Do not use the oven until the relay board is inspected and the faulty relay identified or replaced. F7 (stuck key) and F8 (ADC failure) also indicate control board issues but without the fire hazard.

Quick DIY Checks

1. 1Step 1 — Check error codes and safety: Note any code on the display before touching anything. SAFETY CRITICAL: If F2 is displayed, unplug the oven immediately — this code indicates a stuck relay causing runaway temperature and is a documented fire hazard. Do not use the oven until the relay board is inspected. Other codes: F3 = open sensor circuit (test WB21X10022 — should read ~1,100Ω at room temp); F4 = shorted sensor (reads near-zero); F7 = stuck key on keypad; F8 = ADC failure on control board. Unplug the oven for 5 full minutes to clear capacitor charge and attempt a hard reset before further diagnosis.
2. 2Step 2 — Visual inspection of bake element (electric models): Open the oven door and examine the bake element WB44X200 at the bottom of the cavity. Look along the full coil length for any visible break, gap, blister, or burn hole. On JB-series models (JB735SPSS, JB645RKSS), failures typically appear near the terminal ends where the element enters the oven back wall. Also check the back wall openings for arc marks or discoloration. Visible damage confirms element failure — no multimeter test needed to proceed with replacement.
3. 3Step 3 — Multimeter test on bake element: Unplug the oven from the wall outlet. Remove the two element mounting screws at the oven back wall. Pull the element gently toward you to expose the flat spade connectors behind the back wall. Disconnect both connectors. Set multimeter to ohms. Touch probes to both element terminals. Healthy GE bake element WB44X200: 20–40 ohms. OL = burned out, replace. Below 5 ohms = shorted, also replace.

1. 4Step 4 — Glow test for gas igniter (gas models only): Close the gas supply shutoff valve on the flex line at the rear of the range. Restore gas supply, then set the oven to Bake at 350°F. Watch the igniter at the base of the oven cavity in dim lighting — it is below the burner tube. Start timing the moment the igniter begins to glow. The burner should light in under 90 seconds. If the igniter glows for more than 90 seconds without the burner lighting, WB13K21 is weak — replace it. For precision, a clamp meter reading below 3.2A at operating temperature is definitive confirmation of GE igniter failure (spec: 3.2–3.6A). Close the gas valve before any hands-on work.
2. 5Step 5 — Temperature sensor resistance test (GE spec: 1,100Ω): Unplug the oven. Locate the temperature sensor probe WB21X10022 at the upper-rear corner of the oven cavity — a thin metal tube about 5–6 inches long, secured with 2 Phillips screws. Remove the screws, pull the sensor partially out, and disconnect the 2-wire connector. Set multimeter to ohms. Measure across both sensor leads at room temperature (68–72°F). GE spec: approximately 1,100 ohms (acceptable range: 1,050–1,150Ω). IMPORTANT: GE's 1,100Ω spec is different from Whirlpool-platform sensors (1,080Ω) — do not apply the Whirlpool benchmark to a GE sensor. OL = F3 code (replace). Near-zero = F4 code (replace).
3. 6Step 6 — Broil element test (electric models): If bake works but broil does not, test the broil element WB44X5044. Unplug the oven. Locate the broil element at the top of the oven cavity. Remove its mounting screws, pull forward to access the spade connectors, and disconnect both wires. Measure with multimeter on ohms: healthy GE broil element reads 20–40 ohms. OL = failed, replace WB44X5044 ($25–$55).
4. 7Step 7 — Wiring harness and thermal fuse inspection: If element, igniter, and sensor all test good, check the wiring harness for pinched or melted insulation — especially at the door hinge area where repeated opening/closing fatigues the wires. Also test the thermal fuse: locate the flat disk-shaped fuse on the oven cavity back wall or near the control board, disconnect it, and measure continuity. Good = near-zero ohms. OL = blown fuse, replace. A blown thermal fuse on a GE oven often indicates a prior overheat event — check if F2 was previously stored.
5. 8Step 8 — Control board relay diagnosis: If all components test good and the oven still won't heat — or if F2 returned after reset — the control board relay is the likely culprit. Inspect the control board PCB visually for burn marks around relay solder joints, cracked relay housing, or discoloration. On JB-series boards, the bake relay is typically a plug-in relay on the main PCB. For PB935YPFS (GE Profile slide-in), the control board is behind the rear panel accessed from the back of the range. Control board part numbers vary by model — use your full model number to source the correct board ($100–$300).
6. 9Step 9 — Diagnostic mode (select GE models): On some GE models, press Clock + 7 + 8 + 9 simultaneously to enter diagnostic mode. On GE Profile models (JGS760SPSS, PB935YPFS), try pressing Bake + Broil Hi + Bake simultaneously. Stored fault codes appear on the display. Record all codes before clearing. F2 = relay/runaway temp (fire hazard); F3 = open sensor; F4 = shorted sensor; F7 = stuck key; F8 = ADC failure. Not all GE models support the same diagnostic entry method — consult the tech sheet (usually behind the storage drawer or inside the control panel cover).

Repair vs Replace

Recommended Tools & Parts

• GE Oven Bake Element — WB44X200

  Replacement lower bake element for GE electric ovens including JB735SPSS and JB645RKSS. Tests at 20–40 ohms when functional. Mounts with 2 screws to oven back wall, connects via flat spade terminals. Visually inspect first — breaks, blisters, or burn holes confirm failure before ordering.

  $25–$50

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• GE Oven Broil Element — WB44X5044

  Replacement upper broil element for GE electric ovens. Tests at 20–40 ohms when functional. Fixes no-heat on broil function while bake still works. Confirm compatibility with your full GE model number.

  $25–$55

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• GE Gas Oven Igniter — WB13K21

  Hot surface igniter for GE gas ranges including JGS760SPSS and CGS750P2MS1. Must draw 3.2–3.6A to open the gas safety valve. Replaces igniters that glow orange but fail to light the burner within 90 seconds. Accessed by removing the oven bottom panel.

  $25–$55

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• GE Oven Temperature Sensor — WB21X10022

  NTC thermistor temperature probe for GE ovens. GE spec: approximately 1,100 ohms at room temperature (note: different from 1,080Ω Whirlpool-platform spec). Covers F3 (open) and F4 (short) error codes. Mounts at upper-rear corner of oven cavity with 2 screws.

  $20–$45

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• Digital Multimeter

  Required for testing bake element resistance (20–40Ω), broil element (20–40Ω), temperature sensor (1,100Ω GE spec), igniter resistance, and thermal fuse continuity. Any meter in the $15–$40 range handles all GE oven diagnostics.

  $15–$40

  Buy on Amazon →

Links are Amazon affiliate links (tag: fixitfastai-20). Prices are estimates.

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