AC Fuse Location for Ford Focus – Fix Your AC in 5 Minutes!

Last Updated on May 5, 2025 by Nick

Is your Ford Focus AC not blowing cold air? Before spending money at a repair shop, check your AC compressor fuse and relay — this quick DIY could save your summer and your wallet.

In this guide, we’ll walk through the AC fuse and relay locations for Ford Focus models from 2009 to 2021, covering both MK2, MK3, and MK4 generations. Whether you’re working with the fuse box inside the cabin or under the hood, we’ve got you covered. So let’s go and do that together.

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🔧 Why Check the AC Fuse First?

If your AC suddenly stops working, don’t panic. A blown fuse or faulty relay is often the culprit — and these are easy to check and replace at home. All you need are your hands and maybe a multimeter.

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🚗 2009–2011 Ford Focus AC Fuse Location (MK2.5)

🔍 Interior Cabin Fuse Box:

• Location: Behind the panel near the steering wheel.
• Remove the cover to access the fuses.
• Key fuses to check:
  • Two 10-amp fuses responsible for the AC control interface.
  • If either is blown, your AC system won’t function.

🔍 Engine Bay Fuse Box:

• Main AC Fuse:
  • 10-amp fuse dedicated to the AC compressor clutch.
  • A blown fuse means the clutch won’t engage.
• AC Relay:
  • Find the compressor clutch relay.
  • Try tapping the relay gently while the AC is on — if the clutch engages, the relay may be stuck.
  • Swap it with a known working relay (e.g., reverse light relay) to test further.

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🚗 2012–2018 Ford Focus AC Fuse and Relay (MK3)

🔍 Fuse Box Location:

• Located in the engine bay on the driver’s side.

🔧 What to Check:

• Fuse F27 (15-amp, blue):
  • Powers the AC compressor clutch.
  • If it’s blown, the clutch won’t engage = no cold air.
• Relay R11:
  • Located just below F27.
  • Test with a multimeter or swap with another relay from the box.

✅ Tip: If your AC works after swapping the relay, replace the faulty one with a new one.

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🚗 2019–2021 Ford Focus AC Fuse Location (MK4)

🔍 Engine Bay Fuse Box:

• Located between the battery and the nearside wing (driver’s side).
• For visuals, check out this video.

🔧 What to Check:

• Red 10-amp Micro2 fuse for the AC compressor clutch.
• Look for a break in the metal strip inside the fuse to identify if it’s blown.
• Always replace with the correct amperage and fuse type.

💡 Tip: If the new fuse doesn’t solve the issue, check for loose wiring or test the socket with another working device.

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✅ Final Thoughts: Save Time and Money with This Easy DIY

Before you recharge the system or replace major components, check your AC fuses and relays. It could be a simple 5-minute fix that restores your cold air and avoids a costly mechanic visit.

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📹 Watch the Full Video Tutorial

Prefer to watch instead of read? Check out the full video walkthrough on my YouTube channel:

If this guide helped you out, leave a comment, hit like, and subscribe to my YouTube channel for more Ford Focus DIY repair tips!

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