Smelly AC and Dealership Fix? - 2014+ Jeep Cherokee Forums
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post #1 of 39 (permalink) Old 05-24-2016, 12:39 PM Thread Starter
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Smelly AC and Dealership Fix?

My AC smells moldy when we start the vehicle each time. I changed the filter to see if that would fix it and it didn't. I thought I remembered reading the there is a correct procedure for the dealership to follow to clean the AC ducts and system. I took it to the stealership and all they did was set HVAC to High heat for a while with all windows up and let the "Vehicle Interior temp rise to eliminate mold from evaporator and let sit for approx 3 hours" and they put AC on and said no smell from vents and the problem is corrected. Please help.

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post #2 of 39 (permalink) Old 05-24-2016, 12:45 PM
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Does it still smell moldy? If so, take it back and request that they service the AC system.

Keep in mind, this may be beyond the warranty of the vehicle which would result in you paying for the service.

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post #3 of 39 (permalink) Old 05-24-2016, 12:45 PM
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Quote:
Originally Posted by baggio10 View Post
My AC smells moldy when we start the vehicle each time. I changed the filter to see if that would fix it and it didn't. I thought I remembered reading the there is a correct procedure for the dealership to follow to clean the AC ducts and system. I took it to the stealership and all they did was set HVAC to High heat for a while with all windows up and let the "Vehicle Interior temp rise to eliminate mold from evaporator and let sit for approx 3 hours" and they put AC on and said no smell from vents and the problem is corrected. Please help.

Thanks


I don't know about the dealership, my dealership for my Ford never was able to fix my problem. That being said, I have had success with this product.

Amazon Amazon

Not to mention that it is guaranteed. The only problem is that your car will smell a little bit like a pool for the next week or two as it does use chlorine dioxide. I had no problems with it at all it works better than bombs do because it does not shoot an aerosol all over your car. Just follow the directions and it works perfectly.

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Last edited by Xinarin13; 05-24-2016 at 12:49 PM.
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post #4 of 39 (permalink) Old 05-24-2016, 12:45 PM
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I've used Kool it on my previous car for the same issue. Worked great. Stick it up the drain plug


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post #5 of 39 (permalink) Old 05-24-2016, 02:53 PM Thread Starter
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Found it. Desoto posted this.
STANDARD PROCEDURE - A/C EVAPORATOR CLEANING

Some vehicle operators may experience a musty odor from the A/C system, primarily at start up in hot and humid climates. This odor may be the result of microbial growth on the cooling coil. During normal A/C system operation, condensation forms in and around the A/C cooling coil. When airborne pollutants mix with this condensation, bacteria and fungi growth begins and odor may result.
If the vehicle operator experiences a musty odor when operating the A/C system, perform the following procedure.

WARNING:Always use eye protection, rubber gloves and protective clothing when performing the following procedure. Avoid continuous breathing of vapors from evaporator coil cleaning and sealing fluids. Avoid contact with skin and eyes. Failure to follow these instruction may result in possible serious or fatal injury.



On models equipped with a cabin air filter, remove the filter and inspect for dirt and debris (Refer to 24 - Heating and Air Conditioning/Distribution/FILTER, Cabin Air - Removal) . Discard the used cabin filter if required.
Remove the cowl panel cover (refer to 23 - Body/Exterior for more information).
Clean any dirt and debris that may be present at the HVAC fresh air inlet screen and at the top of the cowl panel.
Install the cowl panel cover.
Raise and support the vehicle.
Inspect the evaporator drain hose or tube (depending on application) for foreign material that may be blocking the drain and repair as necessary.
Once drain operation has been verified;
when equipped with a rubber drain hose, temporarily pinch the drain hose closed using an appropriate pair of heater hose pliers.
when equipped with a solid plastic drain tube, obtain an appropriate size rubber or plastic cap or plug and temporarily cap or plug the drain tube.

Lower the vehicle.
Place a protective cover over the front passenger side floor and seat area.
Remove the blower motor (Refer to 24 - Heating and Air Conditioning/Distribution/MOTOR, Blower - Removal) .
Remove the blower motor power module (Refer to 24 - Heating and Air Conditioning/Controls/MODULE, Power - Removal) .
Clean any dirt and debris that may be present inside the HVAC blower motor housing and all readily accessible areas inside the HVAC housing. If necessary, use a vacuum with a small flexible hose, and take caution not to damage the evaporator core fins.
Using PSE Flex Spray Delivery Tool 534-62637 or equivalent, completely coat the entire surface of A/C evaporator with three bottles of Mopar® Cooling Coil Cleaner through the blower motor and power module or resistor openings. Be sure to use all of the coil cleaner in each container.
Allow the vehicle to sit for 30 minutes.
Raise and support the vehicle.
WARNING:Excess cooling coil cleaner will drain from the evaporator housing when the clamp, cap or plug is removed from the evaporator drain hose or tube. Always use eye protection, rubber gloves and protective clothing. Avoid continuous breathing of vapors from evaporator coil cleaning fluid. Avoid contact with skin and eyes. Failure to follow these instruction may result in possible serious or fatal injury.


Remove the previously installed clamp, cap or plug from the evaporator drain hose or tube and allow excess coil cleaner to drain from the HVAC housing.
Lower the vehicle.
Refill the three empty coil cleaner bottles with clean tap water.
Using PSE Flex Spray Delivery Tool 534-62637 or equivalent, completely rinse the entire surface of A/C evaporator with the three bottles of clean tap water through the blower motor and power module or resistor openings. Be sure to use all of the water in each container.
Install the blower motor (Refer to 24 - Heating and Air Conditioning/Distribution/MOTOR, Blower - Installation) .
Install the blower motor power module (Refer to 24 - Heating and Air Conditioning/Controls/MODULE, Power - Installation) .
Disconnect the wire harness connector from the A/C compressor to disable compressor operation (Refer to 24 - Heating and Air Conditioning/Plumbing/COMPRESSOR, A/C - Removal) .
Start the engine
Adjust all the windows so they are open approximately 8 mm (0.5 in.).
Set the A/C-heater controls to the following:
air distribution to Panel and Recirculation mode
temperature to full heat

Allow the vehicle to run for 20 minutes.
Turn the engine off.
Raise and support the vehicle.
Inspect the evaporator drain hose or tube (depending on application) for foreign material that may have blocked the drain during evaporator coil cleaning and repair as necessary.
Once drain operation has been verified;
when equipped with a rubber drain hose, temporarily pinch the drain hose closed using an appropriate pair of heater hose pliers.
when equipped with a solid plastic drain tube, obtain an appropriate size rubber or plastic cap or plug and temporarily cap or plug the drain tube.

Lower the vehicle.
Remove the blower motor (Refer to 24 - Heating and Air Conditioning/Distribution/MOTOR, Blower - Removal) .
Remove the blower motor power module (Refer to 24 - Heating and Air Conditioning/Controls/MODULE, Power - Removal) .
Using PSE Flex Spray Delivery Tool 534-62637 or equivalent, completely coat the entire surface of A/C evaporator with one bottle of Mopar® Cooling Coil Coating through the blower motor and power module or resistor openings. Be sure to use all of the coil coating in the container.

NOTE:Be sure to thoroughly clean out the spray delivery tool with warm water once coil coating is complete to prevent damage to the tool.

Refill the empty bottles with clean warm tap water and completely rinse out the PSE Flex Spray Delivery Tool 534-62637, or equivalent.
Allow the vehicle to sit for 30 minutes.
Install the blower motor (Refer to 24 - Heating and Air Conditioning/Distribution/MOTOR, Blower - Installation) .
Install the blower motor power module (Refer to 24 - Heating and Air Conditioning/Controls/MODULE, Power - Installation) .
Raise and support the vehicle.
WARNING:Excess cooling coil coating will drain from the evaporator housing when the clamp, cap or plug is removed from the evaporator drain hose or tube. Always use eye protection, rubber gloves and protective clothing. Avoid continuous breathing of vapors from evaporator coil sealing fluid. Avoid contact with skin and eyes. Failure to follow these instruction may result in possible serious or fatal injury.


Remove the previously installed clamp, cap or plug from the evaporator drain hose or tube and allow excess coil coating to drain from the HVAC housing.
Lower the vehicle.
Start the engine
Adjust all the windows so they are open approximately 8 mm (0.5 in.).
Set the A/C-heater controls to the following:
air distribution to Panel and Recirculation mode
temperature to full heat

Allow the vehicle to run for 20 minutes.
Turn vehicle off.
Remove protective cover from front passenger side floor and seat area.
On models equipped with a cabin air filter, install the filter (Refer to 24 - Heating and Air Conditioning/Distribution/FILTER, Cabin Air - Installation) .
Connect the wire harness connector to the A/C compressor (Refer to 24 - Heating and Air Conditioning/Plumbing/COMPRESSOR, A/C - Installation) .
Verify proper A/C-heater system operation.

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post #6 of 39 (permalink) Old 05-24-2016, 06:17 PM
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Oof... that sounds expensive...

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post #7 of 39 (permalink) Old 05-26-2016, 02:33 AM
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I'll put in my 2 cents with a method I've used for years on all my vehicles.

1. Go get yourself a can of fresh scent Lysol spray disinfectant.
2. Crack windows about an inch, turn ac on high recirculate off run for about 5 mins.
3. Open hood and spray for about 30 seconds into vent just below windshield on passenger side with ac still running.
4. Let ac run for about another 5 mins, then shut compressor off and run for another 2.
5. Enjoy the musty free smell!

Another tip to prevent this is to shut the ac button off but keep the fan running a couple minutes before coming to your final stop. This aids in drying out the moisture which leads to this problem in the first place. Hope this tip helps you and a lot of others. It's kept mine smelling great for years. If you use the ac a lot, I suggest doing this every 4-6 weeks for best results.
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post #8 of 39 (permalink) Old 05-26-2016, 02:48 AM
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Quote:
Originally Posted by Craigman TH View Post
I'll put in my 2 cents with a method I've used for years on all my vehicles.

1. Go get yourself a can of fresh scent Lysol spray disinfectant.
2. Crack windows about an inch, turn ac on high recirculate off run for about 5 mins.
3. Open hood and spray for about 30 seconds into vent just below windshield on passenger side with ac still running.
4. Let ac run for about another 5 mins, then shut compressor off and run for another 2.
5. Enjoy the musty free smell!

Another tip to prevent this is to shut the ac button off but keep the fan running a couple minutes before coming to your final stop. This aids in drying out the moisture which leads to this problem in the first place. Hope this tip helps you and a lot of others. It's kept mine smelling great for years. If you use the ac a lot, I suggest doing this every 4-6 weeks for best results.
See, but the "ac" removes moisture from the air...

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post #9 of 39 (permalink) Old 05-26-2016, 07:48 AM
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Worse case scenario - pull cabin filter and put a "FEW" drops
of your favorite car smell on it as all the air passes thru it.
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post #10 of 39 (permalink) Old 05-27-2016, 08:28 PM
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I did a stinky AC yesterday, no time for a Dealer trip. Found a half full product called "Ultrashield" here in the shop. It is one of many meant for spraying in the intake vents. I blocked the AC Evap Drain and basically followed the Dealer procedure and removed the Blower Motor. I did let it sit overnight. Next day I used Lysol as a rinsing agent, installed the Blower. Then followed the instructions on the can for the Vents with no filter. Might be worth a try if your Dealer won't do it under Warranty.
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Last edited by Desoto; 05-27-2016 at 08:29 PM. Reason: spelling
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