Jenn-Air Oven Error Code 4d32

Error code 4d32 indicates a reverse airflow fan state error in the lower oven cavity, meaning the control board has detected the fan running when it should be off. This is specific to units using a UH1/2 control configuration. When this fault is active, the control disables all cooking functions for the lower oven as a protective measure. The most likely cause is a fan relay that has failed in the closed position or a wiring fault in the fan circuit.

When 4d32 is active, the control board automatically disables all cooking functions for the lower oven cavity, so that section of the oven will not operate. This is a built-in protective response designed to prevent unsafe conditions. You should not attempt to bypass this lockout, and the oven should not be used until the underlying fan relay or wiring fault is diagnosed and corrected.

Repair costs vary depending on which component has failed. A fan relay replacement is generally the least expensive fix, with parts typically in the range of $20 to $60 and labor costs on top of that if a technician is used. If the UH1/2 control board requires replacement, parts alone can range from $150 to $400 or more depending on the specific model. A full diagnostic service call from a technician typically adds $75 to $150 before any parts are factored in.

A knowledgeable DIYer comfortable working with appliance wiring can inspect the fan relay and wiring harness for visible damage or a stuck relay contact condition. However, accessing the control board and relay typically requires disassembling panels and working near high-voltage components, so caution is essential. If the relay needs replacement or the control board is at fault, having the correct replacement part and comfort with appliance repair is necessary. If you are unsure, a qualified technician is the safer option.

A power reset by disconnecting the oven from its electrical supply for several minutes may temporarily clear the fault code. However, if the underlying cause, such as a welded relay contact or wiring short, is still present, the code will return as soon as the control performs its fan state check again. A reset alone does not fix the hardware problem and is not a reliable long-term solution.