In this guide, you will find instructions on how to recharge BMW Air Conditioner (AC) with R134a refrigerant (freon). Follow the step-by-step instructions below and make sure to watch the how-to video as well.
If your BMW blows hot air but no cold air, it may be an indication that the A/C system is low on refrigerant. Even though other problems can cause a BMW to stop blowing cold air, low refrigerant due to is often the problem. Recharging BMW 5-Series AC system with freon will sometimes fix the problem. The good news is that you can recharge a BMW 5-Series A/C with freon yourself.
Here are a few symptoms that may indicate that your car's air conditioner is low on refrigerant.
- Hot air blowing from air vents
- A/C clutch doesn't engage
Before you start
- Instructions that are provided with your A/C recharge kit supersede these instructions.
- A/C pressure will be in the high range when the engine is turned off. This is normal.
- If you A/C works for a few days then stops blowing cold air, it is usually an indication of a large refrigerant leak.
What you will need
Turn on A/C
Locate A/C Port
Connect A/C Recharge Kit
Check A/C System
BMW AC Recharge Cost
Average cost to recharge BMW AC system is between $90 and $150. Note that this is the cost to top off a system that may have a small leak. If your BMW AC system is completely empty and needs to be filled with R134 refrigerant, the cost will be between $150 and $300 depending on the refrigerant capacity of your BMW.
Frequently Asked Questions
The most common problem is vent actuator in vehicles with dual zone A/C. They can get stuck in one position and do not switch when you change the temperature. In vehicles that use duo-valves they can also get stuck in which case half of the car blows hot air and the other blows cold air.
The cooling fan for the condenser may not be working.
The blower fan may be defective.
AC may be low on freon. Also check low-pressure switch. If defective it can prevent the compressor from operating.
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