Sharp R-1214 Stirrer Fan Cover Replacement – Step-by-Step Guide

I’ve worked on the Sharp R-1214 commercial microwave more times than I can count, and the burned or warped stirrer fan cover is hands-down the most common service call I get on this unit. Food splatter builds up on that mica cover and eventually causes arcing that chars or warps it beyond use. The good news is a straightforward cover swap almost always resolves the sparking completely.

Dave Holt — Certified Appliance Repair Technician

Experience: 15+ years servicing residential & commercial appliances • Certifications: EPA 608 Certified, NATE-recognized technician • Former lead technician at a multi-state appliance service company • Specialties: Washers, dryers, refrigerators, dishwashers, ovens, microwaves, ice makers

Stirrer Fan Cover Replacement Guide

If your Sharp R-1214 commercial-quality microwave has a burned or warped stirrer fan cover (waveguide cover) from arcing, replacing it is a MODERATE difficulty repair. The stirrer fan cover prevents food splatters from entering the waveguide and causing arcing. A damaged cover can cause sparking, arcing, and damage to the magnetron.

🔨 Pro Tip from Dave

On the Sharp R-1214, don’t confuse the stirrer fan cover with a generic mica sheet — this model uses part number PCOVPB048MRK0, and using an undersized or wrong-thickness replacement is a mistake I see DIYers make constantly. The cover must sit flush against the waveguide cavity wall with no gaps; even a slight misalignment will cause arcing to resume immediately after repair. Also inspect the waveguide cavity itself for carbon scoring before installing the new cover.

Understanding Stirrer Fan Covers

Stirrer fan covers (also called waveguide covers):

Protect the waveguide opening from food splatters
Prevent arcing and sparking inside the microwave
Are typically made of mica or ceramic material
Can burn or warp from excessive heat or arcing
Are located in the top of the cooking cavity
Are relatively inexpensive to replace

A damaged cover can cause serious problems, including magnetron failure, so it should be replaced promptly.

Symptoms of Cover Failure

Common signs that indicate stirrer fan cover failure:

Sparking or arcing inside the microwave cavity
Burning smell during operation
Visible damage to the cover (burned, warped, or cracked)
Food particles entering the waveguide area
Microwave shuts off due to arcing
Reduced heating efficiency

⚠️ Safety Warning

Always unplug the microwave before beginning any repair. Wait 60 seconds after unplugging to allow capacitors to discharge. A damaged stirrer fan cover can cause arcing, which is dangerous and can damage the magnetron.

Parts Needed

Check each product page for other buying options. (Part #: PCOVPA226WRK0)

Note: Ensure you get the correct cover for your specific model. The cover must fit properly to prevent arcing.

Tools Required

Phillips Screwdriver – #2 size
Flashlight – To see inside the cavity
Clean cloth – For cleaning the waveguide area

Step-by-Step Instructions

Step 1: Unplug and Prepare

Unplug the microwave from the wall outlet. Wait at least 60 seconds. Remove any items from inside the microwave. Open the door fully to access the cooking cavity.

Step 2: Locate the Stirrer Fan Cover

The stirrer fan cover is located in the top of the cooking cavity. Look for a cover or grille in the ceiling of the microwave. It may be held in place by screws, clips, or may simply slide into place. The cover protects the waveguide opening where microwaves enter the cavity.

Step 3: Inspect the Cover

Before removing, inspect the cover for:

Visible damage, burning, or warping
Cracks or holes
Food particles or grease buildup
Signs of arcing or scorching
Proper fit and alignment

Step 4: Remove the Old Cover

The cover may be held in place by screws, clips, or may slide out. Remove any mounting screws using your Phillips screwdriver. If it’s clipped in place, carefully release the clips. If it slides out, gently pull it down. Remove the old cover carefully.

Step 5: Clean the Waveguide Area

While the cover is removed, clean the waveguide area:

Remove any food particles or debris
Clean the waveguide opening
Wipe away any grease or buildup
Inspect the waveguide for damage
Ensure the area is dry before installing the new cover

Important: If the waveguide shows signs of damage or burning, the microwave may need professional service.

Step 6: Install the New Cover

Position the new Sharp PCOVPA226WRK0 stirrer fan cover in the same location as the old one. Ensure it fits properly and sits flush. The cover should cover the waveguide opening completely. If it has a specific orientation, match it to the original. Secure it with screws or clips, depending on how it’s mounted.

Step 7: Verify Installation

Check that the cover:

Sits properly and covers the waveguide opening
Is securely mounted (doesn’t wobble or move)
Is properly aligned
Doesn’t interfere with the stirrer fan operation

Step 8: Test the Installation

Plug the microwave back into the wall outlet. Place a cup of water in the center of the turntable. Start a 1-minute cooking cycle on high power. Monitor for:

No sparking or arcing inside the cavity
No burning smells
Water should heat up normally
No unusual sounds
Microwave should run for the full cycle without shutting off

If you see sparking or arcing, immediately unplug and check the cover installation and waveguide for damage.

Troubleshooting

If sparking or arcing continues after replacement:

Verify the cover is properly installed and seated
Check the waveguide for damage or burning
Inspect the magnetron (may be damaged from previous arcing)
Ensure the cover is the correct size for your model
Check for food particles or debris in the waveguide
Verify the stirrer fan is working properly

Preventing Future Damage

To prevent stirrer fan cover damage:

Keep the microwave interior clean
Wipe up food splatters immediately
Don’t run the microwave empty for extended periods
Avoid placing metal objects in the microwave
Clean the cover periodically
Replace the cover if it shows any signs of damage

When to Call a Professional

Consider professional help if:

The waveguide shows signs of damage or burning
The magnetron may have been damaged from arcing
Sparking continues after cover replacement
Multiple components need attention
You’re not confident in your ability to properly install the cover

← Back to Top 20 Microwave Models & Common Repair Issues Guide

How Much Does This Repair Cost?

The replacement stirrer fan cover for the Sharp R-1214 typically runs $8–$18 for a genuine or OEM-compatible part. If you call a professional technician, expect to pay $75–$150 total including labor for this repair. Given the simplicity of the fix, this is one of the best DIY money-savers on any commercial microwave.

Recommended Products

These are the parts and tools we recommend for this repair, based on compatibility and customer reviews:

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