Thermador PRD304WHU Repair & Common Issues

The PRD304WHU is a 30-inch Pro Harmony® dual-fuel range with 4 sealed Star burners (2 of them ExtraLow-capable for precise simmering) over a 4.4 cu. ft. True Convection oven. As with Thermador’s other dual-fuel ranges, we diagnose the gas cooktop side (igniters, burner ports, gas valve) and the electric oven side (heating element, convection fan, control board) as largely separate systems that happen to share one control panel.

A numbered “E” error code here follows Thermador’s general reset-then-call-if-it-recurs convention rather than one fixed per-number meaning.

Key Features

30-inch Pro Harmony® dual-fuel range with 4 Star® burners, including 2 ExtraLow® simmer burners
4.4 cu. ft. oven capacity with True Convection
2-hour Super-Fast Self-Clean and Sabbath mode
Hydraulic SoftClose hinges on the oven door

Most Common Issues on This Model

01

A Star burner clicks but won't light, or won't stay lit at ExtraLow simmer

02

Oven side won't reach temperature or complete a self-clean cycle

03

Display shows a numbered "E" error code

04

Persistent gas smell near the cooktop section

Error Codes Common to This Model

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Have the model number to hand when you book, so the technician arrives knowing which parts this model uses and where it usually fails.

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FAQ

Thermador PRD304WHU FAQ

They use the same burner and igniter hardware with a modified gas-valve calibration for very low simmer output, so diagnosis follows the same process.

Not in a way that increases problem risk — it's a documented feature of this model's heating and insulation design, not a shortcut that skips a step.

Thermador PRD304WHU