Dacor HWO230PS Heritage Wall Oven F3 Error Fix: Shorted Oven Temperature Sensor (RTD)

Error code F3 on the Dacor HWO230PS Heritage Wall Oven means: Shorted Oven Temperature Sensor (RTD). The oven temperature sensor (RTD — Resistance Temperature Detector) has a shorted circuit. The sensor resistance is reading too low (near zero ohms), indicating a short in the sensor element or its wiring. Check the sensor harness and connection between the oven sensor and the oven control board. Measure the sensor resistance — at room temperature (75°F), it should read approximately 1080-1100 ohms. If the reading is very low or zero, replace the RTD sensor. Also check the wiring for damaged insulation causing a short to ground.

The most successful fix is "Replace Shorted Oven Temperature Sensor (RTD) and Inspect Wiring" (medium difficulty, ~45 minutes). Estimated DIY cost: $20-$30. HomeMD has 2 community-ranked fixes for this error.

This error is rated high severity. You should address it promptly — continued use could cause damage or safety concerns.

Yes — the top-ranked community fix ("Replace Shorted Oven Temperature Sensor (RTD) and Inspect Wiring") is rated medium difficulty and takes about 45 minutes. Tools needed: T20 Torx screwdriver, Digital multimeter.

DIY cost: $20-$30. Professional repair typically costs $150-$220. Many homeowners save money by trying the top-ranked community fix first.

The Dacor HWO230PS Heritage Wall Oven has 8 other known error codes, including: F0 (Function Key Stuck), F1 (System Watchdog Circuit Fault), F2 (Heating Mode Over-Temperature), F4 (Open Oven Temperature Sensor (RTD)), F7 (Door Lock Enabled Above Temperature), and 3 more.

Error code F3 also appears on 6 other Dacor models: DMW2420S 24 in 1.2 cu ft 1000W Sensor Microwave Oven, DOB30M977DS 30 in 4.8 cu ft True Convection Wall Oven with WiFi, DOC30M977DS 30 in 4.8 cu ft Combination Wall Oven with Microwave and True Convection, DOP48M96DPS 48 in 6 Burner 5.5 cu ft 18,000 BTU Modernist Dual Fuel Range, DP36M96NDS Pro 36" Dual Fuel, ER30DSCH Distinctive Dual-Fuel Range. The fix may vary by model, so check each model's specific page for tailored repair steps.