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Ford Focus · 2011

2011 Ford Focus Air Conditioning Fuse & Relay

Air con not blowing cold? Check the compressor and clutch fuses and relay first.

  • UK specification
  • Verified data
  • Checked 14 October 2026
  • Sources
Which 2011 Focus do you have?

The air conditioning fuse & relay differs between versions of the 2011 Ford Focus. Until you choose, every possible result is shown.

Not sure which Focus you have?
  • Ford UK lists the 2011 Focus under more than one model name: Focus - B4 (C307 post-MCA) and Focus (2010). Their fuse layouts differ.
  • Ford UK’s Owner Manuals page can find your car’s handbook from its VIN. The page it opens is titled with Ford’s model name, for example “Focus - B4 (C307 post-MCA)”.
  • Your printed owner’s handbook, or a franchised dealer with your VIN, can also confirm it.
  • Many cars carry a manufacturer’s label (often called the VIN plate) that can show the build or production date. It is commonly on a door pillar, under the bonnet or at the base of the windscreen, but the exact place varies.
  • Your owner’s handbook, service record or original sales paperwork may show the build date or specification.
  • The first registration date on your V5C logbook is not the build date. Cars are often built weeks or months before they are registered, so it is only a rough guide near a changeover.
  • A franchised dealer can usually confirm the build date and specification from your VIN.
  • Still unsure? Compare the legend on your fuse box cover with each option.

If you can’t confirm it, keep both results in mind and check the fuse box legend before removing anything.

Quick answer

Verified

Option A Focus - B4 (C307 post-MCA)

  • UK specification
  • Verified data
  • Checked 14 October 2026
  • Sources
Fuse
27
Amperage
10A
Fuse box
Engine compartment
Location
In the engine compartment

Quick answer

Verified

Option B Focus (2010) · Built 6 December 2010 to 7 March 2011

  • UK specification
  • Verified data
  • Checked 14 October 2026
  • Sources

Air conditioning clutch

Fuse
27
Amperage
15A
Fuse box
Engine compartment
Location
In the engine compartment

Air conditioning

Fuse
71
Amperage
10A
Fuse box
Passenger compartment
Location
In the passenger compartment

PTC heater, passenger airbag deactivation switch, heated seats switch, parking heater, manual air conditioning heater module

Fuse
85
Amperage
7.5A
Fuse box
Passenger compartment
Location
In the passenger compartment

Air conditioning module

Fuse
12
Amperage
10A
Fuse box
Load compartment
Location
In the load (luggage) compartment

Applies to: with voltage quality module

Quick answer

Verified

Option C Focus (2010) · Built 8 March 2011 to 7 August 2011 or Focus (2010) · Built 8 August 2011 to 8 January 2012

  • UK specification
  • Verified data
  • Checked 14 October 2026
  • Sources

Air conditioning clutch

Fuse
27
Amperage
15A
Fuse box
Engine compartment
Location
In the engine compartment

Air conditioning

Fuse
71
Amperage
10A
Fuse box
Passenger compartment
Location
In the passenger compartment

Climate control heater, passenger airbag deactivation switch, heated seats switch, auxiliary heater, manual air conditioning heater module

Fuse
85
Amperage
7.5A
Fuse box
Passenger compartment
Location
In the passenger compartment

Air conditioning module

Fuse
12
Amperage
10A
Fuse box
Load compartment
Location
In the load (luggage) compartment

Applies to: with start-stop module

Where is the fuse box?

Option A Focus - B4 (C307 post-MCA)

Engine compartment fuse box

In the engine compartment

Our source doesn’t describe how to open this fuse box. Check your owner’s handbook.

Option B Focus (2010) · Built 6 December 2010 to 7 March 2011

Engine compartment fuse box

In the engine compartment

Our source doesn’t describe how to open this fuse box. Check your owner’s handbook.

Passenger compartment fuse box

In the passenger compartment

  1. Pinch the retaining clips to release the cover.
  2. Lower the fuse box cover and pull it towards you.

Load compartment fuse box

In the load (luggage) compartment

Our source doesn’t describe how to open this fuse box. Check your owner’s handbook.

Option C Focus (2010) · Built 8 March 2011 to 7 August 2011 or Focus (2010) · Built 8 August 2011 to 8 January 2012

Engine compartment fuse box

In the engine compartment

Our source doesn’t describe how to open this fuse box. Check your owner’s handbook.

Passenger compartment fuse box

In the passenger compartment

  1. Pinch the retaining clips to release the cover.
  2. Lower the fuse box cover and pull it towards you.

Load compartment fuse box

In the load (luggage) compartment

Our source doesn’t describe how to open this fuse box. Check your owner’s handbook.

Fuse box diagram

Full 2011 Ford Focus fuse chart

Option A Focus - B4 (C307 post-MCA)

We haven’t drawn a schematic of the engine compartment fuse box for this version yet. Use the fuse and relay numbers on this page and the legend on the fuse box to find the right position.

Where to look

  • 27

    In the engine compartment

    Fuse ·10A · Air conditioning clutch

    Position not shown on the schematic. Find fuse 27 on the fuse box legend.

Always confirm the number against the legend on the fuse box cover before pulling anything.

Option B Focus (2010) · Built 6 December 2010 to 7 March 2011

We haven’t drawn a schematic of the engine compartment fuse box for this version yet. Use the fuse and relay numbers on this page and the legend on the fuse box to find the right position.

We haven’t drawn a schematic of the passenger compartment fuse box for this version yet. Use the fuse and relay numbers on this page and the legend on the fuse box to find the right position.

We haven’t drawn a schematic of the load compartment fuse box for this version yet. Use the fuse and relay numbers on this page and the legend on the fuse box to find the right position.

Where to look

  • 27

    In the engine compartment

    Fuse ·15A · Air conditioning clutch

    Position not shown on the schematic. Find fuse 27 on the fuse box legend.

  • 71

    In the passenger compartment

    Fuse ·10A · Air conditioning

    Position not shown on the schematic. Find fuse 71 on the fuse box legend.

  • 85

    In the passenger compartment

    Fuse ·7.5A · PTC heater, passenger airbag deactivation switch, heated seats switch, parking heater, manual air conditioning heater module

    Position not shown on the schematic. Find fuse 85 on the fuse box legend.

  • 12

    In the load (luggage) compartment

    Fuse ·10A · Air conditioning module

    Position not shown on the schematic. Find fuse 12 on the fuse box legend.

Always confirm the number against the legend on the fuse box cover before pulling anything.

Option C Focus (2010) · Built 8 March 2011 to 7 August 2011 or Focus (2010) · Built 8 August 2011 to 8 January 2012

We haven’t drawn a schematic of the engine compartment fuse box for this version yet. Use the fuse and relay numbers on this page and the legend on the fuse box to find the right position.

We haven’t drawn a schematic of the passenger compartment fuse box for this version yet. Use the fuse and relay numbers on this page and the legend on the fuse box to find the right position.

We haven’t drawn a schematic of the load compartment fuse box for this version yet. Use the fuse and relay numbers on this page and the legend on the fuse box to find the right position.

Where to look

  • 27

    In the engine compartment

    Fuse ·15A · Air conditioning clutch

    Position not shown on the schematic. Find fuse 27 on the fuse box legend.

  • 71

    In the passenger compartment

    Fuse ·10A · Air conditioning

    Position not shown on the schematic. Find fuse 71 on the fuse box legend.

  • 85

    In the passenger compartment

    Fuse ·7.5A · Climate control heater, passenger airbag deactivation switch, heated seats switch, auxiliary heater, manual air conditioning heater module

    Position not shown on the schematic. Find fuse 85 on the fuse box legend.

  • 12

    In the load (luggage) compartment

    Fuse ·10A · Air conditioning module

    Position not shown on the schematic. Find fuse 12 on the fuse box legend.

Always confirm the number against the legend on the fuse box cover before pulling anything.

How to replace the fuse safely

  1. Switch off the ignition and all electrical equipment. Take the key out, or move a keyless fob away from the car.
  2. Open the fuse box and find the fuse using the number on the cover legend or the chart on this page.
  3. Pull the fuse straight out with the plastic fuse puller (usually clipped inside the fuse box) or fine-nose pliers.
  4. Look at the metal strip inside the fuse. A broken or burnt strip means it has blown.
  5. Fit a new fuse with exactly the same amperage rating. The number on top and the colour should match.
  6. Refit the cover, switch on and test the component.
  • Never fit a fuse with a higher amperage rating than specified. It can let wiring overheat.
  • Never bridge a fuse with wire, foil or anything else.

Fuse keeps blowing?

A fuse that blows again straight away is doing its job. Something on that circuit is drawing too much current. Common causes are damaged wiring shorting to the bodywork, a failing motor or socket, water getting in, or a faulty accessory. Fitting fuse after fuse, or a bigger fuse, won’t fix the fault and can overheat the wiring. Have the circuit tested by an auto electrician.

Not the fuse? Check these next.

  • Refrigerant level

    Air conditioning slowly loses refrigerant. A system that blows cool but not cold often just needs a re-gas.

  • Compressor clutch

    With the engine running and A/C on, the centre of the compressor pulley should turn. If it doesn’t, check the fuses and relay.

  • No air at all

    If no air comes out of the vents, the problem is the heater blower, not the air conditioning.

Sources & verification

Option A Focus - B4 (C307 post-MCA)

Status
Verified
Specification
UK market
Last checked
14 October 2026

Option B Focus (2010) · Built 6 December 2010 to 7 March 2011

Status
Verified
Specification
UK market
Last checked
14 October 2026
  • Manufacturer manual listingFord UK — 2010 Focus (2010) owner manuals · Ford Motor Company · Owner’s Manual (Vehicles Built From: 06/12/2010 Vehicles Built Up To: 07/03/2011) · Accessed 14 October 2026
  • Manufacturer manual listingFord UK — 2011 Focus (2010) owner manuals · Ford Motor Company · Owner’s Manual (Vehicles Built From: 06/12/2010 Vehicles Built Up To: 07/03/2011) · Accessed 14 October 2026
  • Owner’s manualFord Focus (2010) Owner’s Manual — CG3568en, edition 09/2010 · Ford Motor Company · Fuse specification chart — Engine compartment fuse box (pp. 175–177); Fuse specification chart — Passenger compartment fuse box (pp. 179–180); Fuse specification chart — Load compartment fuse box (pp. 180–182) · Accessed 14 October 2026

Option C Focus (2010) · Built 8 March 2011 to 7 August 2011

Status
Verified
Specification
UK market
Last checked
14 October 2026
  • Manufacturer manual listingFord UK — 2011 Focus (2010) owner manuals · Ford Motor Company · Owner’s Manual (Vehicles Built From: 08/03/2011 Vehicles Built Up To: 07/08/2011) · Accessed 14 October 2026
  • Owner’s manualFord Focus (2010) Owner’s Manual — CG3568en, edition 12/2010 · Ford Motor Company · Fuse specification chart — Engine compartment fuse box (pp. 188–190); Fuse specification chart — Passenger compartment fuse box (pp. 191–193); Fuse specification chart — Load compartment fuse box (pp. 193–195) · Accessed 14 October 2026

Option D Focus (2010) · Built 8 August 2011 to 8 January 2012

Status
Verified
Specification
UK market
Last checked
14 October 2026
  • Manufacturer manual listingFord UK — 2011 Focus (2010) owner manuals · Ford Motor Company · Owner’s Manual (Vehicles Built From: 08/08/2011 Vehicles Built Up To: 08/01/2012) · Accessed 14 October 2026
  • Manufacturer manual listingFord UK — 2012 Focus (2010) owner manuals · Ford Motor Company · Owner’s Manual (Vehicles Built From: 08/08/2011 Vehicles Built Up To: 08/01/2012) · Accessed 14 October 2026
  • Owner’s manualFord Focus (2010) Owner’s Manual — CG3568en, edition 08/2011 · Ford Motor Company · Fuse specification chart — Engine compartment fuse box (pp. 180–182); Fuse specification chart — Passenger compartment fuse box (pp. 183–185); Fuse specification chart — Load compartment fuse box (pp. 185–187) · Accessed 14 October 2026

Fuse layouts can differ between trim levels and optional equipment. Always confirm against the legend on your fuse box.