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Converting old rotary style controls to digital
February 9, 2012
8:24 am
Steve Pooler
Forum Posts: 1127
Member Since:
November 12, 2008
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Woodsong...Sorry for the delayed reply, but thanks for asking~


First I would need to know what brand systems you have & if they are split, or self contained...I'm thinking your model Bayliner model may have one of each in the Marine Airrr brand.

Going with Marine Airrr brand controls on Marine Air Brand equip it was made for, can make many things easier but not necessarily cheaper (is you time worth anything to you)

Below is a copy & paste from the price book & if that does not come out well try page 18 of the Marine Air drop down link at the top of this page...

Deleted it....It didn't work out as expected....I do discount the kits...Just can't quote in Puiblic.


We also offer a universal kit that requires a box for the circuit board to mount into, and it will not control the "Variable" fan speed of your Marine Airrr automatically...A rheostat must be installed in-line but the kit is cheaper...And priced as discounted...








February 8, 2012
12:46 am
Chattanooga, TN on the TN River
New Member
Forum Posts: 1
Member Since:
February 8, 2012
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New here but this forum looks great!  We just bought a "new" 1987 Bayliner 4550 pilothouse.  She has 3 marine air units with the typical 3 rotary knob controls.  An ok set up I guess but I miss my digital controls we had on our trawler.  :)

How difficult and how expensive is it to convert these units over to digital controls?  Can digital controls just be wired in and poof you are good to go? 

If too expensive to make practical sense to go real issue is that I don't want to hear the fan blowing 24/7 when the unit is powered on.  We like the peace and quiet.  :)

If I stick with the rotary controls, is there a way to set it up where the fan turns off between heating or cooling modes?

Lastly, I have read somewhere or another that it is possible to open the rotary control up and adjust the fan speed lower limits.  Right now the lower fan speed doesn't seem to lower the fan speed much at all.  Maybe if I can adjust down the fan it will be more tolerable.  It's not an issue of the air blowing on us that is irritating- more just the noise of the fan on in the background.


Thanks in advance for any insight or help! 

1987 Bayliner 4550 Pilothouse

Chattanooga, TN