Warranty Information

All compressor come with a one year warranty with the purchase of an accumulator/drier and expansion device (expansion valve or orifice tube). In some cases where the drier is built in to the condenser or the system has a parallel flow condenser and there is debris in the system, a condenser is required with the purchase. Parallel flow condensers are non flushable and any debris from a contaminated system will cause high head pressure if not replaced and void any warranty.

All automotive air conditioning components sold on this website are guaranteed to be free from defects in material and workmanship under normal use for a period of one year from the original date of purchase. All new and remanufactured compressors come complete with clutch and pulley, and are R12 and R134a compatible. The only warranties applying to product(s) sold are those which may be offered by the manufacturer. Max-AC.com does not authorize any person, representative, company or organization other then Max-AC.com's management to assume for it any liability in connection with the sale, use or shipment of our product(s). Buyer shall not be entitled to recover from the selling dealer any consequential damages to property, damages for loss of use, loss of time of profit, or income, or any incidental damage.

Our sole obligation under this warranty, shall be to replace any defective product that is returned to us. Warranty  requests must have a RMA issued by Max-AC.com prior to return. Claims for defective product(s) will require proof of purchase. Damage caused by installation , abuse, or use not intended for the product(s) will void the warranty. Max-AC.com will not be responsible for other costs associated with the failure of product(s) including, labor, refrigerant, refrigerant oil, shipping.

Installation Procedure

Standard industry service practice & manufacturers compressor replacement procedures must be followed, failure to follow these procedures will void warranty.

  1. Remove old compressor, removal of hoses, accumulators/driers, expansion valves/orifice tubes are needed for proper flushing. Do not flush any of the following components, accumulators/driers, expansion valves/orifice tubes. These items must be replaced.
  2. Inspect evaporator core and condenser for any blockages. Flush entire system with an approved flush, followed by compressed air. Itís best to flush the evaporator core and condenser many times in both directions to achieve the cleanest system possible. For compressors that have had major failure, these items must be replaced.
  3. Install replacement compressor. Depending upon the compressor manufacturer, some replacement compressors may be shipped With or Without refrigerant oil. It is the installer's responsibility to make sure the compressor has the appropriate amount of refrigerant oil, and that it is compatible with the type of refrigerant being used.
  4. Install new accumulator or receiver drier.
  5. Install new expansion valve or orifice tube.
  6. The system must be evacuated for at least 45 minutes.
  7. Charge system with the appropriate amount of refrigerant.

Air Conditioner Compressor Failures

Second only to refrigerant hose leaks, compressors have the highest rate of failure of any motor vehicle air conditioner (HVAC) component. Yet compressors very seldom fail on their own and it is imperative that the cause of failure be properly diagnosed and corrected when replacing the compressor. If this is not done, your replacement compressor will also fail in a very short time. A compressor is an engine. Engine failure is almost always caused by a "lubrication" or a "coolant" problem. Compressors fail for the same reasons.

Referring to the air conditioner, "coolant failure" means not dissipating heat from the condenser or having too much heat in the condenser. (Similar to a problem in the engine's radiator). Too much heat means too high head pressure. On very hot days this means a high side reading well over 300PSI. High head pressure is caused by:

  1. Too much refrigerant. (Overcharge) Debris blocking the condenser.
  2. A clogged radiator/cooling system.
  3. A defective fan clutch or switch that activates the fan clutch.
  4. A pinched tube in the condenser or too small of a condenser (if retrofitted or replaced).
  5. Improperly operating shutters.
  6. Contaminated refrigerant.
  7. Excessive air content (non-condensables gas) in system.

Just as this is a common cause of engine problems, so too is "lubrication failure" that causes most compressor problems. The compressor needs to be lubricated by a special refrigerant compatible oil. The oil is "carried" through the a/c system by the refrigerant. Loss of refrigerant means no carrier of the oil and no lubrication for the compressor. Loss of refrigerant is caused by a leak in the system. There is several feet of aluminum tubing and flexible hose lines that can become dry and brittle do to age of the vehicle, or become damaged and cause a leak.

There can also be other reasons for loss of lubrication to the compressor. A blockage in the system. This will keep oil from returning to the compressor and will normally show up as too low a reading on the low pressure gauge. "Too Low" a reading means 0-10 PSI or a vacuum. The blockage may be in the form of a clogged condenser, evaporator core, accumulator/filter, receiver/drier, expansion valve, or orifice tube. So remember, compressor failure is caused by: "COOLANT FAILURES" or "LUBRICATION FAILURES".

Causes Of Replacement Compressor Failure

  1. Failure to properly diagnose and correct the problem that caused the system to fail before installing replacement compressor.
  2. Any contaminants not flushed out of the system.
  3. Solvent not completely flushed from the system.
  4. Partially restricted receiver drier, accumulator, orifice tube, expansion valve, condenser, lines, or evaporator core.
  5. Not spending at least 45 minutes vacuuming the system.
  6. Too little refrigerant (causing the compressor to overwork).
  7. Too much refrigerant (causing high head pressure which will destroy the compressor).
  8. Excessive air content (non-condensable gas) in system.
  9. Condenser cooling fan or clutch fan not operating properly.