Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSMERCURY2009MILAN PREMIER, 3.0 1, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1281 (HVAC CLIMATE CONTROL SYSTEM - GENERAL INFORMATION & DIAGNOSTICS)GENERAL PROCEDURESFLUORESCENT DYE LEAK DETECTIONFLUORESCENT DYE DETECTION
2009 Mercury Milan Premier, 3.0 1, AWD
Fluorescent Dye Detection
2009 Mercury Milan Premier, 3.0 1, AWDSECTION Fluorescent Dye Detection
WARNING: This page is about a different car, the 2009 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Ford Motor Company vehicles are produced with R-134a fluorescent dye installed in the refrigerant system from the factory. The location of leaks can be pinpointed by the bright yellow-green glow of the fluorescent dye under a UV lamp. Since more than one leak can exist, make sure to inspect each component, line and fitting in the refrigerant system for a leak.
- Check for leaks using a Rotunda-approved UV lamp and dye enhancing glasses.
- Inspect all components, lines and fittings of the refrigerant system.
- If a leak is found, recover the refrigerant. For additional information, refer to Air Conditioning (A/C) System Recovery, Evacuation and Charging .
- Repair the refrigerant system leak(s).
- Evacuate and charge the refrigerant system. For additional information, refer to Air Conditioning (A/C) System Recovery, Evacuation and Charging .
- After the leak(s) is repaired, remove any traces of fluorescent dye with a general purpose oil solvent.
NOTE:
Use of dye-enhancing glasses or goggles greatly improves the detection of the dye under the UV lamp.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.