Am I missing something about my AC?

CaptBobO

Member
Aug 31, 2020
49
Boat Info
2000 410 Sundancer
Engines
8.1L Mercruiser Horizon
I have a Cruisair with a SMX II control panel.
When I turn on my AC switch on the distribution panel, It starts up in what ever mode was last. (Cool or heat)
For the life of me, I can not get the set temp to be adjusted. hitting up or down does nothing while the SET light is lit up.
When I hit TEMP and try to adjust that, nothing changes. I am guessing that TEMP is telling me what the ambient temp is. Is that correct?
How do I adjust my SET temp setting? Can anyone help with that?

IMG_4898.jpg
 
I have a Cruisair with a SMX II control panel.
When I turn on my AC switch on the distribution panel, It starts up in what ever mode was last. (Cool or heat)
For the life of me, I can not get the set temp to be adjusted. hitting up or down does nothing while the SET light is lit up.
When I hit TEMP and try to adjust that, nothing changes. I am guessing that TEMP is telling me what the ambient temp is. Is that correct?
How do I adjust my SET temp setting? Can anyone help with that?

View attachment 93532
Mine looks just like that and all I have to do is push up for more heat or down for less heat. I think it will switch back to your room temp while it is working
 
Mine looks just like that and all I have to do is push up for more heat or down for less heat. I think it will switch back to your room temp while it is working
Thats the way I thought it should work, except mine is not doing any of that switching.
Do you think my control pad is going out?
 
when you push temp, it is just switching from the setting temp to the room temp

maybe push the cool button, then adjust the temp down to make it kick on... or press the heat then increase the temp to go above ambient temp...

in my book, there is a way to hit reset, its a series of buttons to push.... info is at the boat, but try that....
 
I have a Cruisair with a SMX II control panel.
When I turn on my AC switch on the distribution panel, It starts up in what ever mode was last. (Cool or heat)
For the life of me, I can not get the set temp to be adjusted. hitting up or down does nothing while the SET light is lit up.
When I hit TEMP and try to adjust that, nothing changes. I am guessing that TEMP is telling me what the ambient temp is. Is that correct?
How do I adjust my SET temp setting? Can anyone help with that?

View attachment 93532

Bob,

flightsystems.com will either refurbish yours, or sell you a completely new unit. They manufacture their own. The original design has a flimsy circuit board that flexes and eventually cracks. The costs are quite reasonable ($175). I bought one of theirs for our 280 (same as yours) a couple years before we sold the 280 without any issues.
 
One additional note. If you press and hold heat and cool the SMX will go into an "auto" mode to switch back and forth between heat and cool depending on difference between the set point and the ambient temp. Took me a while to discover that feature.

The climate control feature is great and we have been using it since we got the boat...
 

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