Ford Focus · 2010
2010 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
Partly covered: not every 2010 build range has been verified yet. Confirm against the legend on your fuse box.
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)
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
- Pinch the retaining clips to release the cover.
- 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 2010 Ford Focus fuse chartOption 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)
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.
How to replace the fuse safely
- Switch off the ignition and all electrical equipment. Take the key out, or move a keyless fob away from the car.
- Open the fuse box and find the fuse using the number on the cover legend or the chart on this page.
- Pull the fuse straight out with the plastic fuse puller (usually clipped inside the fuse box) or fine-nose pliers.
- Look at the metal strip inside the fuse. A broken or burnt strip means it has blown.
- Fit a new fuse with exactly the same amperage rating. The number on top and the colour should match.
- 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)
- Manufacturer manual listingFord UK — 2010 Focus - B4 (C307 post-MCA) owner manuals · Ford Motor Company · Owner’s Manual (Vehicles Built From: 29/04/2010) · Accessed 14 October 2026
- Manufacturer manual listingFord UK — 2011 Focus - B4 (C307 post-MCA) owner manuals · Ford Motor Company · Owner’s Manual (Vehicles Built From: 29/04/2010) · Accessed 14 October 2026
- Online owner’s manualFord Focus - B4 (C307 post-MCA) online Owner’s Manual (O16758) — Fuse Specification Chart · Ford Motor Company · Fuse specification chart — Engine compartment fuse box; Fuse specification chart — Passenger compartment fuse box · Accessed 14 October 2026
Option B Focus (2010)
- 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
Fuse layouts can differ between trim levels and optional equipment. Always confirm against the legend on your fuse box.