[UnionPacific]

I have up-sized my raw water pump for my AC...
It went from blowing not very cold air, to iceing up. I have cleaned the evaporator coil, but it still freezes up. Has anyone done an upgrade on the fan to increase air flow? I feel like the AC has more capacity then the fan will allow for.

S/V Union Pacific : Cool it!

Its a marvair 16K unit.

 

[UnionPacific]

Icing is a symptom of insufficient Freon not inadequate air flow. Given your comments on the thread dealing with Marine Pricing, I'm sure you can invent something yourself but if not, contact a knowledgeable marine AC technician who may be able to find and repair the leak and recharge your system and get you another year or two out of it before you replace it.

So if my condenser is too cold, its low on freon?

 

[UnionPacific]

FWIW The AC unit has a high and low pressure sensor and cut off.

 

[UnionPacific]

I had thought of a dirty fan wheel. I may take it off an inspect.
The unit draws air thru a vented door. 12" x 12". The air comes from the forward bedroom.
The unit does run about 22 hours a day. I believe the rear unit is undersized. The boat came with a 16K and a 6 or 8K rear unit. I believe this may be undersized. I am seeking out a second 16K to mount aft, adding 8-10K should solve the issue of running all day.
This is most likely my issue, thou airflow may be a second factor.

evaporator coil is icing up.
not the watercooled portion, but the air cooled portion