Most Expensive Microwaves to Repair: 2026 Ranking

2026 ranking, most expensive first#

Why the premium brands cost more#

No aftermarket competition. Thermador magnetrons, Wolf control boards and Miele door interlock assemblies are built to brand-specific specifications with no third-party equivalents. When a Whirlpool magnetron fails, three aftermarket manufacturers compete with the factory price and push it down. When a Thermador magnetron fails, there is exactly one part and one price.

Built-in installation. Most premium microwaves live inside cabinetry — drawer units from Wolf and Sharp, speed ovens from Thermador and Miele, trim-kit installations from Bosch and KitchenAid. Reaching the internals means partially dismantling the mounting system and sometimes pulling the whole unit out, which adds 20-40 minutes of labour to every repair compared with a countertop or standard over-the-range machine.

Combination appliances. Many premium units are microwave plus convection oven, or microwave plus steamer. Those functions bring their own convection fans, heating elements, steam generators and much more complex boards. A Thermador speed oven board manages microwave, convection and speed cook modes at once, and it costs accordingly.

The four repairs that cost the most#

• Magnetron replacement. The symptom is a microwave that runs but does not heat. Premium magnetrons cost 50-100% more than mainstream equivalents, and they are still worth fitting on a built-in unit.
• Control board replacement. An unresponsive touchpad or persistent error codes. Speed oven boards carrying convection logic are the most expensive boards in the category.
• Door mechanism and interlock. The door will not close securely or the unit refuses to start. Premium brands use sturdier mechanisms, which also means pricier ones.
• Convection fan motor. On speed ovens, a worn fan motor bearing makes noise or stops convection working altogether.

Repair or replace?#

Premium microwaves carry a higher repair threshold than standard models, purely because replacing them is so expensive:

• Built-in speed ovens — repair almost any manageable fault. The cabinetry integration and installation cost is what makes replacement punishing.
• Microwave drawers — repair manageable faults. Drawer mechanisms are model-specific and need professional installation.
• Premium over-the-range and built-in units — repair manageable faults, remembering that a standard replacement still carries installation labour.

If you own a premium microwave, budget for one repair across its 8-12 year life and treat it as money well spent. The exception is a magnetron failure on a unit already past ten years, where several other components are likely close to end of life too.

For a new purchase, Bosch gives the best balance of premium features against moderate repair costs.

We are trained on Thermador, Wolf, Miele and Bosch built-in models. Book a repair.