Open temperature sensor

F4 is the mirror image of a shorted probe: here the board sees no path at all, so treat it as a broken connection to hunt down rather than a drifted reading to interpret
Reach behind the range and unseat then firmly re-seat the probe plug at the board header — a plug walked loose by oven vibration is the single most common and cheapest cause of an open reading
Ohm the probe across its two pins expecting a finite room-temperature value; a meter that shows over-limit with the plug off confirms the break is in the probe or its tail, not the board
Run the probe lead by hand from the cavity gland to the plug and feel for a stiff, baked, or nicked spot — self-clean heat embrittles that tail until a strand parts and reads open
If the plug is tight and the lead is sound but the probe still meters open, the sensing element itself has failed and the probe is renewed as a unit
Pro Diagnostic Tip
Chase the connection before you buy a probe: an open reading is nearly always a loose rear plug or a heat-parted lead strand, both of which meter over-limit exactly like a dead element. Re-seat the plug and wiggle-test the tail first, because a five-minute connector fix routinely stands in for a needless probe swap on these ranges.
Repair Difficulty
Moderate — Some Experience NeededEstimated Repair Cost
$80–$200
Parts + labor. Free diagnosis with repair.
Parts That May Need Replacement
Combustion analyzer ($300), igniter tester ($120), temperature calibrator ($150), and gas pressure manometer. Our technician arrives with $3,000+ in professional tools — your diagnostic is free.
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Gas ovens involve live gas lines — a loose connection creates explosion and carbon monoxide risk. Electric ovens run on 240V circuits. Our techs are licensed and insured — let them handle the risk.
Licensed & Insured · 90-Day Warranty · Same-Day Service
Error code F4 is a high-severity issue that can cause further damage to your oven / range if left unresolved. A licensed technician can diagnose and fix it the same day.
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Whirlpool error code F4 indicates: Open temperature sensor. This is a high-severity issue affecting your oven / range.
F4 is the mirror image of a shorted probe: here the board sees no path at all, so treat it as a broken connection to hunt down rather than a drifted reading to interpret Then, Reach behind the range and unseat then firmly re-seat the probe plug at the board header — a plug walked loose by oven vibration is the single most common and cheapest cause of an open reading Then, Ohm the probe across its two pins expecting a finite room-temperature value; a meter that shows over-limit with the plug off confirms the break is in the probe or its tail, not the board There are 2 more steps — see the full troubleshooting guide above. This repair typically requires professional tools and expertise.
Besides the error code on the display, common signs include: Oven will not heat and the element never energizes; The panel shows an absurdly low or dashed-out temperature; The fault posts the instant the oven is switched on. If you notice any of these symptoms, check your oven / range's display panel for error code F4.
Repair costs for Whirlpool F4 typically range from $80 to $200 depending on the specific cause and parts needed. EasyBear offers free diagnosis when you proceed with the repair. Call (415) 795-7300 for a same-day appointment.