Wolf MS24 Built-In Microwave Not Heating: Magnetron Replaced in Los Altos
A Wolf MS24 built-in microwave in Los Altos stopped heating after the customer heard arcing. The magnetron antenna had melted. We ordered a new magnetron, removed the microwave from its trim frame and replaced the magnetron on the table.
Repair at a glance
| City | Los Altos, CA |
|---|---|
| Appliance | Microwave |
| Category | High-End Brands |
| Brand & model | Wolf MS24 built-in microwave, serial 12119474 |
| Repair date | |
| Customer complaint | The customer heard arcing and crackling inside the microwave. After that it ran but no longer heated food. |
| Diagnosis | The antenna on the magnetron had melted and broken apart from arcing. The magnetron had to be replaced. The waveguide area was slightly burnt but still sound. |
| Repair cost | $597 (parts and labor) |
| Warranty | 6 months on parts and labor |
| Outcome | Repaired |
What the customer told us
The customer heard arcing and crackling sounds from the Wolf MS24 built-in microwave. After that, it still turned on but stopped heating.
Diagnosis: a melted magnetron antenna
During the diagnostic visit we found the antenna cap on the magnetron had melted and broken apart. Without a working antenna the magnetron cannot send microwave energy into the cavity, so food does not heat.
The customer decided to replace the magnetron right away. About a week later the new part — magnetron W10836571 (LG 2M226) — was in our hands.
The repair
To service this built-in microwave we first removed the trim frame. Only then could the microwave be taken out of the cabinet and put on a table.
We took off the outer cover, removed the old magnetron and installed the new one, then reassembled the microwave, put it back in the cabinet and reinstalled the frame. The work took about one hour.
Result
After the repair the microwave heats properly again. The waveguide area was slightly burnt from the arcing, but it is still in working condition and caused no further problems during testing.
The total for this repair, including the part and labor, was $597. The repair comes with a 6-month warranty on parts and labor.
Photos from this repair
The Wolf MS24 built-in microwave before the repair. 
Door open — the cavity looked normal from the front. 
Arcing marks at the waveguide cover inside the cavity. 
The magnetron antenna cap had melted and broken apart. 
Microwave on the table, original Sharp magnetron in place. 
Outer cover removed to reach the magnetron. 
Old magnetron (left) and the new one (right). 
Close view: melted antenna versus a new antenna cap. 
New magnetron W10836571 (LG 2M226) installed.
Need Wolf microwave repair?
$85 diagnostic applied to the repair. Serving San Jose, San Francisco & the Bay Area.