a/c fan running all the time

acp

Member
Mar 6, 2017
36
Fort Lauderdale
Boat Info
340 Sundance 2001 Dinghy AB 8HP Johnson
Engines
mercruiser 7.4
I have a Sundancer 340 2001 my a/c fan run all the time when the a/c is on. It dos not turn off when compressor cycles off. It's this normal? Is there a way to turn the fan of when compressor cycles like the house a/c?
 
tiara in the snow 01.JPG
That is an option that you can select. Many find the constant on provides better temperature control, particularly in warm weather. But you can turn it off. Read your instruction manual on how to set up your system.
 
I would consider leaving the air circulating to avoid mold growth.
 
I have a Sundancer 340 2001 my a/c fan run all the time when the a/c is on. It dos not turn off when compressor cycles off. It's this normal? Is there a way to turn the fan of when compressor cycles like the house a/c?
You can also leave your ac in the dehumidifier mode to help control moisture, which would save you electric and save extra wear on the ac unit when your not on the boat.
 
Is there a way to turn the fan of when compressor cycles like the house a/c?

You have been given the proper boat advise, leave it running. Now on to your house, keep the fan on at all times. My fan has been on in my current home for 25 years, only off to change filters or clean. In your home are cold and warm pockets of air, in a 2 story the air upstairs is warmer, the down cooler. The fan will even this out without additional cooling or heating if left in the "on" mode. This evening out reduces the need for heating or cooling reducing costs.

MM
 
We stay on our boat a lot and use it year round. The fan running on “constant” bugged me. It is easily programmed for “intermittent.” I also moved the temperature probes from in front of the unit’s intakes and mounted them in inconspicuous places in the salon and cabin where they read true room temp. The final thing I did was to calibrate the controller. I have access to thermometers calibrated in a lab and I sat them beside the probes for a few days and watched and tweaked the controllers. Both units perform just like our home units. Since you can’t have a ceiling fan, I have a small 10” circulator(fan) in the master cabin to move air around constantly.

Winter time, I leave the units set on 55. Summertime on 80 because refrigerator manufacturer states best the Norcold live in 80* or less. In the summer, also leave a fan on to move air. Never had a hint of mold or mildew and we live in the hot, humid south....

Bennett
 
Funny what bugs us, the quiet being blasted away by the AC coming on bugs me more than the constant I get used to hearing all the time.

MM

The other thing...in the winter when the compressor cuts off and the fan continues to run, the blowing air is cool and the admiral gets cold....the other thing is the shear amount of time the fan is running...I would think it would wear out sooner....

Bennett
 
The other thing...in the winter when the compressor cuts off and the fan continues to run, the blowing air is cool and the admiral gets cold....the other thing is the shear amount of time the fan is running...I would think it would wear out sooner....

Bennett


Cold, a common complaint as we move into higher efficiency HVAC equipment. An old 65% efficient gas furnace put out 115+ degree heat, while the modern 95-98% efficient put out 90 degree heat. Both will warm a room, but the inefficient 115 degree heat feels so good because it is higher than body temp.

Not sure about boats but furnace blowers are continuous duty rated.

MM
 

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