AC coil cleaning?

[hausherrs]

Source of the post If it's that bad, the best thing to do is remove the unit entirely, remove the fan assembly, and spray a cleaning product or use pressured water, then blown it out with air from the fan side. Not an easy unit to clean properly in place.

I unbolted it yesterday to get a feel for what it would take to get it spun around. I got lucky. There’s a flimsy filter on it but that was clogged with mold and whatever else is prone to grow on these things. I took it out, dropped it in the shower, and soaked it with tilex. Its working much better now. But still not as good as it should. I think it’s time to run some barnacle buster through it. The high pressure side is a little warm and water flow isn’t as high as I think it should be. Planning on doing that this evening.

At some point I need to work on old problems. But too many new problems!

[tomschauer]

A vac may get you through the season, but if performance is notably different, the coil is probably dirty well into the fins, not just on the surface. A vac wont get the set in dirt.

[waybomb]

If you decide to use a chemical, make sure you flush way more than you think you need to. The last thing you need is to leave chemical on that metal.

[Reelpriority]

I have two of these Turbo units. Both units have two filter systems that require periodic cleaning. The unit has a mesh filter that slides up behind the cooper coils. Carver usually has a return grille with a filter behind the grill that should be cleaned or changed out.
Another option you might want to consider to improve the cooling on these units is to disconnect the seawater hoses from the manifold attached to the A/C pump. You can now make a barbed hose connection and connect a dockside hose to each hose. The dock side hose water pressure will flush out your sea water supply hoses as we'll as the Turbo coils. You should see a noticeable amount of brown sediment flush out of the exterior hull outlets. The A/C system will cool much better.

[tomschauer]

The above mentioned flush will clean the condenser (water side) but if your evaporator (airside) is dirty, you will need to address by cleaning the coil by one or more of the procedures previously mentioned.
Recommend cleaning both sides if you are having issues.

[Reelpriority]

We have two Marine Air Turbo units on our 356 Aft Cabin. Both units have a pull up screen mesh filter behind the cooper tubing. This filter should be checked/cleaned frequently. Also, Carver usually has a filter installed behind the air return grille which should catch most of the airborne dust. Check to see if you have a filter in this location. If not, you can purchase filter meash at Home Depot or Lowes which you can cut with scissors to fit the space behind the air return grille.
Another cooling improvement you might want to try is to flush your seawater cooling lines going to the turbo. Disconnect the seawater hose attached to the manifold and attached your dockside water hose with a barbed hose fitting a small section of water hose. The water pressure from the deck will flush out a significant amount of sediment that is contained in the seawater hoses and the Turbo coils. You feel a noticeable improvement in cooling.

[hausherrs]

Source of the post flush your seawater cooling lines

The front AC unit is a little older. Not sure what model but it allears to be some sort of Dometec / Air ac. When it gets bad it shuts down and will throw a HP (High Pressure) on the thermostat screen. Ive hooked a hose up to that one before to flush for that reason. Ive done both. I ran some barnicle buster through both recently. Let it soak for 3 hours. It works a little better but still seems like theres more room for emprovement. I also cleaned the filter. It was nasty.

Ill hook the hose up to it today and see how much junk I can blow out. Might BB treatment as well.

[tomschauer]

if you are getting and HP (high pressure) fault, your problem is on the condenser (water) side if the trouble is in the A/C mode.

[hausherrs]

Hooked the hose up to the condenser tubes and pumped out quite a bit of mud. I cycled the water on for 30 seconds and off for 2 minutes. I did that three times with quite a bit of mud coming out. On the 4th time it was clear. Front AC is ice cold! The rear is good too but not nearly as good as the front. It'll do.

Thanks,

Steven

[Viper]

What are the ratings on the two units?