Question about 1999 Toyota RAV4

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Air Conditioning System leaks. Source of leak - Evaporator.

How do I replace or repair evaporator, which is cheaper to do? What tools and chemicals do I need to do the work?

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Duplicate question.

Posted on Oct 31, 2012


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Posted on Jan 02, 2017

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SOURCE: freon leak

If your going to attempt this yourself then you need a few things.

Go to your local car parts shop. You will need a Toyota Corrola Manual in order to find the connector on the low pressure side of your AC compressor.

You will need to find this connector first to determine if the connector is a screw fit or a quick release push fit. You also need to work out what refrigerant to add to your car - R22 or R134a. R134a is more environmentally safe ( the numbers are from memory so may be slightly different but buy the manual and check that first for the type of refrigerant used in your model).

You also need to look for a Recharge can with Stop leak and Leak detector in it - they will have it at the auto shop should be under $20 (you may wish to buy two cans just in case as often one isn't enough) - and once you know the type of fitting you need to use you need to by the recharge connector that will fit on the low pressure side and attach to the top of the recharge can.

Typically the leak detector can be a red dye that can be seen by the eye or a yellow dye that glows under untraviolet light - so if you don't have an ultra violet light source its going to be difficult to see the leak with the yellow stuff . The other problem you may have is if the leak is really bad the system may need to be fixed (stop the leak) and the evacualted for the AC unit to really become effective.

Anyway the practice is to find the recharge connection on the low pressure line. Take the cap off.
Connect the recharge hose you bought to the recharge can. This end of the hose has a tap and spike arrangement that is going to puncture the top of the can but you make sure the tap is fully wound out (away from the can) when you fit it initially. Later in the process you are going to wind the pin in to puncture the can once its all set up. So with the can connnected to that end of the hose you have to fit the other end of the hose to the low pressure side of the AC line on the Corrola. Do that as quickly as possible - if its a push fit with locking ring the action of you pushing the connector on does two things opens the AC system and seals the tube connector onto the Low pressure side. Its inportant to do this as fast as possible to prevent any refidgerant that may be in the system from leaking out and to prevent contaminants getting into the system.

Start the car.
Put the AC on full
Go back to the engine and wind the spike into the can fully to puncture the can it and then wind the spike back out again to allow the refrigerant to enter the AC system.

The can should get pretty cold even to the point of icing a little.
Go back in the car and with the AC system on full and the blower turned on to say the 2nd fan position check for cooler air starting to come through the vents in the car.

You should be able to go back round to the engine after say 5 mins and check that the recharge can is now empty.
Screw the spike back into the can - turn the AC and the engine off and disconnect the low pressure side connector on the hose. If its a push fit it has a brash ring you have to pull up to release the tube and then pull the tube off the system.

You can repeat the process with the 2nd can if needed now.
Screw the protective cap back on once you have completed all recharging.

Now two things to check - where are any signs of red dye coming out of the AC system and 2nd does the AC actually work.

If the AC still doesn't work it may just be that you have such a drastic leak that the system needs to be fixed - e.i. a condenser unit replaced or something and now you are into $100s to fix it.

Good luck.

Posted on Aug 08, 2008

  • 466 Answers

SOURCE: air conditioning bad smell

Richard you have to check if your car uses to filter the air-conditioning closed the lid of the engine and where the breeze is a clean-clean grill before you turn off your air off the compressor and that was only working to remove the blower evaporator at all moisture-check that you have good drainage evaporator vote you all that water. Thanks and good luck

Posted on Aug 02, 2009

  • 3433 Answers

SOURCE: how do i clean the a/c evaporator on a toyota 2006 truck

With great difficulty. Have to access it and that means removing the housing under the dashboard. The evaporator cannot be remove so it will det messywith what cleaner you se But if you are willing, git a try. Good Luck, Ned

Posted on Sep 16, 2009

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I have a 1999 Toyota Rav4 that has evaporator leak so the air conditioning system is not working. How do I repair or replace the evaporator and what tools and chemicals do I need for repair?

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Using a cooling system pressure test tool to pressurize the entire cooling system, a heater core will leak into the HVAC [heater, ventilation and air conditioning] box [located under the dash board]. Once coolant leaks into this box, it will either drop onto the carpeting on the passenger side front floor OR drip out the condensate tube [where the A/C condensate water leaks out under the truck] The condensate tube is a rubber pipe located on the lower end of the passenger side firewall.
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Continuous loss of refrigerant in air conditioning system. A/C has been evacuated and tested with dye under pressure but no leaks are found (except my usually excellent mechanic says it might be under the...

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The air conditioning in my 2005 T&C stopped working. Right before it stopped there was a "burnt" smell coming through the vents. What happened?

No air coming from air conditioning vents
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  3. Air conditioner low pressure switch defective. Replace switch.
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I have a Dodge Grand caravan 2007. The air conditioning system does not coo. I took it to Goodyear and they said the rear condenser need to be replace since all the refrigerant leaked. Since the cost is...

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Leak in eavaporer coil how do i get to it

The evaporator coil is located in the heater-A/C housing, under the instrument panel.

The heater-A/C housing assembly must be removed from the vehicle and the two halves of the housing separated for service access of the heater core, evaporator coil, blend-air door, and each of the various mode control doors.

WARNING: On vehicles equipped with airbags, refer to Airbag Systems Safety Information and Procedures. Before attempting any steering wheel, steering column, or instrument panel component diagnosis or service. Failure to take the proper precautions could result in accidental airbag deployment and possible personal injury. See: Restraint SystemsAir Bag SystemsService Precautions

  1. Disconnect and isolate the battery negative cable.
  2. Remove the instrument panel from the vehicle.
  3. If the vehicle is not equipped with air conditioning, go to Step 6. If the vehicle is equipped with air conditioning, recover the refrigerant from the refrigerant system.
  4. Disconnect the liquid line refrigerant line fitting from the evaporator inlet tube.
    • Install plugs in, or tape over all of the opened refrigerant line fittings.
  1. Disconnect the accumulator inlet tube refrigerant line fitting from the evaporator outlet tube. See Refrigerant Line Coupler for the procedures.
    • Install plugs in, or tape over all of the opened refrigerant line fittings.
  1. Drain the engine cooling system.
  2. Disconnect the heater hoses from the heater core tubes. Install plugs in, or tape over the opened heater core tubes.
  3. Unplug the heater-A/C system vacuum supply line connector from the tee fitting near the heater core tubes.
Unplug the heater-A/C unit wire harness connector, which is fastened to the heater-A/C housing next to the blower motor relay.
  1. Remove the five nuts from the heater-A/C housing mounting studs on the engine compartment side of the dash panel. Remove or reposition the evaporation canister for additional access, if required.
  2. Pull the heater-A/C housing rearward far enough for the mounting studs and the evaporator condensate drain tube to clear the dash panel holes.
  3. Remove the heater-A/C housing from the vehicle.
  1. Position the heater-A/C housing to the dash panel. Be certain that the evaporator condensate drain tube and the housing mounting studs are inserted into their correct mounting holes.
  2. Install and tighten the five nuts onto the heater-A/C housing mounting studs on the engine compartment side of the dash panel. Tighten the nuts to 6.2 Nm (55 in. lbs.) .
  3. If the evaporation canister was repositioned during the removal procedure, reinstall it to its proper position.
  4. Connect the Heater-A/C system vacuum supply line connector to the tee fitting near the heater core tubes.
  5. Unplug or remove the tape from the heater core tubes. Connect the heater hoses to the heater core tubes and fill the engine cooling system.
  6. If the vehicle is not equipped with air conditioning, go to Step 10. If the vehicle is equipped with air conditioning, unplug or remove the tape from the accumulator inlet tube and the evaporator outlet tube fittings. Connect the accumulator inlet tube coupler to the evaporator outlet tube.
  7. Unplug or remove the tape from the liquid line and the evaporator inlet tube fittings. Connect the liquid line coupler to the evaporator inlet tube.
  8. Evacuate the refrigerant system.
  9. Charge the refrigerant system.
  10. Install the instrument panel in the vehicle.
  11. Connect the battery negative cable.
  12. Start the engine and check for proper operation of the heating and air conditioning systems.

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