WHAT YOU NEED TO KNOW BEFORE YOU PURCHASE A REFRIGERATION CONTROL VALVE
WHAT YOU NEED TO KNOW BEFORE YOU PURCHASE A REFRIGERATION CONTROL VALVE

 
Without getting overly technical, electronic refrigeration control valves open and close using PWM (Pulse Width Modulation). It is not a simple open or closed situation.
 We want to give you all the knowledge necessary to successfully and safely repair your vehicle so it is important that you realize certain things which I will enumerate below.  
  1. There is no accurate or reliable way to look these valves up by application, especially if your vehicle is a Volkswagon. In any event, to be sure you are ordering the correct part you will need to physically look at the old valve while it is still in the compressor.

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  2. If your vehicle is a Volkswagon your compressor may be one of four brands: Sanden, Denso, Zexel or Delphi. If it is a Sanden we will need to know if it is held in with a snap ring or with a bolt.

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  3. Often people are not sure which valve to order. You are welcome to call us for assistance. That is what we are here for. If we do not answer we will see the missed call and call you back.

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  4. Under the best of circumstances it is important to know that although it works in 99% of installations, sometimes changing the RC Valve does not solve the problem. No matter how classic the symptoms are changing the valve is a prudent but calculated gamble.

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  5. RC Valves are *VERY* dirt sensitive. Do not install them into a contaminated system. If you see dirt on the old valve it is a safe assumption that at the very least you will need to chemically flush the system and change the drier.

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  6. RC Valves are an electrical component and as such there is no warranty. Because you installed a new valve and still do not get cold air does not mean the valve is defective. As we said, sometimes a new valve doesn't solve the problem.

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  7. PLEASE REALIZE THAT THE SYSTEM MUST BE COMPLETELY VOID OF FREON BEFORE YOU ATTEMPT TO REMOVE THE EXISTING VALVE. It will shoot out LIKE A BULLET if there is pressure behind it and the snap ring or hold down bolt is removed. Do not assume the system is empty because you drained one side of the system. Check the other side for pressure also. Sometimes gas will be slow to migrate from the high to the low side and vice versa, giving the false impression the system is empty when it is not.