If your microwave oven has started sparking, flashing, or producing crackling sounds, don’t rush to replace expensive parts just yet.
In most cases, the issue is caused by a burnt microwave waveguide cover, a small, low-cost component that protects the waveguide opening.
At Instant Device, we sell precision-cut microwave waveguide covers (sketched directly from the original factory part) for only KES 299, making this one of the most cost-effective microwave repairs in Kenya.
👉 Buy Microwave Waveguide Cover (KES 299 Only!)
What Is a Microwave Waveguide Cover?
A microwave oven waveguide cover is a thin mica sheet installed inside the microwave cavity that protects the waveguide opening while allowing microwave energy to pass through safely.
Its main functions:
- Prevent food particles and grease from entering the waveguide
- Protect the magnetron antenna from contamination
- Reduce internal arcing and sparking
- Extend the lifespan of the microwave
Over time, heat, moisture, and grease cause the waveguide cover to burn, carbonize, or crack, leading to visible sparks.
Why a Damaged Waveguide Cover Causes Sparking
When the waveguide cover becomes:
- Burnt
- Grease-soaked
- Cracked
- Carbonized
…it starts conducting electricity unevenly, resulting in arcing (sparking) inside the microwave cavity.
⚠️ This is often mistaken for a magnetron failure, yet replacing the waveguide cover solves the problem in a large percentage of cases.
Why Replacing the Waveguide Cover Is the Smart First Repair
Replacing the waveguide cover is both a repair and a diagnostic step.
Why it’s cost-effective:
- Costs only KES 299
- Easy to replace (no special tools)
- Helps eliminate more complex faults
- Prevents unnecessary disposal of a working microwave
Smart diagnostic logic:
- Replace the waveguide cover
- If sparking stops → problem solved cheaply
- If sparking continues → inspect:
- Magnetron antenna cap
- Magnetron unit
- Waveguide interior
👉 This elimination method keeps repair costs low and avoids guesswork.
🔗 Related (Coming Soon): Microwave Magnetron Explained – Symptoms, Costs & Diagnosis
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Microwave Waveguide Cover vs Magnetron: Which Should You Replace First?
| Component | Cost Range | Difficulty | Replace First? |
|---|---|---|---|
| Waveguide Cover | KES 299 | Very Easy | YES |
| Magnetron Antenna Cap | Low | Easy | If sparking persists |
| Magnetron | High | Complex | Last resort |
👉 Order Waveguide Cover Before Replacing Expensive Parts
Why Buy Your Waveguide Cover from Instant Device?
At Instant Device, our waveguide covers are:
- Cut to size from original factory patterns
- Made from microwave-safe material
- Suitable for most microwave oven models
- Ideal for home users, technicians & restaurants
Retail Price: KES 299
👉 Shop Microwave Waveguide Covers Online
Where to Buy Microwave Waveguide Covers in Nairobi
📍 Instant Device – Nairobi
We offer walk-in purchases and technical guidance for microwave repairs.
📞 Call / WhatsApp Orders:
+254 768679055/ +254114746858
Nationwide Delivery: Migori, Namanga, Mombasa & Beyond
For customers outside Nairobi, we offer flexible shipping via bus companies or package couriers.
How the Process Works:
1️⃣ Choose a bus or courier company serving Nairobi → Bamburi / Mombasa
2️⃣ Confirm your order with us
3️⃣ We deliver the item to the courier’s Nairobi office
4️⃣ Ask their staff to confirm the item
5️⃣ Pay us:
- Item cost KES 299
- KES 100 dispatch fee
Packaging is done only after payment.
Courier charge:
Bus companies typically charge KES 200, paid directly to them on pickup.
Frequently Asked Questions (FAQ)
Can I use metal or cardboard instead of a mica waveguide cover?
❌ No. This is dangerous and can damage the magnetron or start a fire.
Can I clean a burnt waveguide cover?
Only if it’s lightly dirty. Burnt or carbonized covers must be replaced.
Is replacing the waveguide cover safe?
Yes. It’s one of the safest microwave repairs when done with the unit unplugged.
Final Verdict: Small Part, Big Savings
Replacing a microwave waveguide cover is the cheapest, fastest, and smartest way to fix a sparking microwave.
For KES 300, you:
- Eliminate the most common sparking cause
- Diagnose deeper faults accurately
- Avoid unnecessary magnetron replacement
👉 Order Your Microwave Waveguide Cover Today
- 0768679055 Call or WhatsApp Instant Device. Nationwide delivery available.