Air conditioner (can't seem to find an answer in old posts)

D

Drifter85258

New Member
Aug 12, 2012
171
Annapolis
Boat Info
350 Sundancer 2008
Previous 2007 SR 340, 2006 Rinker 300, 1997 Bayliner 26, 1985 SR 23
Engines
T-8.1s, closed cooling
I am sure this has been covered someplace but I can't seem to find it. My ac seems to not shut down once it has achieved the desired temp. For example, I have the fan on auto and the temp on the ac set to 70 cool (not cool / heat). The ac never shuts off and just keeps getting colder until which point I manually shut it off. It pumps water the entire time which tells me the compressor is on.

Second issue and maybe related, the ac has frozen up a few times. I have cleaned all filters. What might cause this other than air flow?

Last, the temperature sensor is on the unit that is inside the after closet. I assume the theory is that the circulating air will give it a good reading but it seems to always show a few degrees below what the cabin temp is and maybe because the ac is starting to freeze up?

thanks in advance!
 
1. Try factory memory reset 2. You can adjust your inside Temp reading manually. I often find the temp off a little bit every season after winter layup. 3. My unit freezes up once in awhile also. When this happens run FAN ONLY on high until air starts blowing out again... Usually about 5 minutes. This will un-freeze unit.


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Drifter85258 said:
I am sure this has been covered someplace but I can't seem to find it. My ac seems to not shut down once it has achieved the desired temp. For example, I have the fan on auto and the temp on the ac set to 70 cool (not cool / heat). The ac never shuts off and just keeps getting colder until which point I manually shut it off. It pumps water the entire time which tells me the compressor is on.

Second issue and maybe related, the ac has frozen up a few times. I have cleaned all filters. What might cause this other than air flow?

Last, the temperature sensor is on the unit that is inside the after closet. I assume the theory is that the circulating air will give it a good reading but it seems to always show a few degrees below what the cabin temp is and maybe because the ac is starting to freeze up?

thanks in advance!
Click to expand...

Remember cold air is heavier than hot air. So the colder air will always settle at floor level dependent on how powerful your fan is. That colder air is then sucked into the A/C via the temperature sensor - so it might register a few degrees lower than it is in average in the cabin.

I don't know why you AC does not switch off. But it can be you need a reset as previously mentioned.
 
I wish I had that problem.... My thermostat never goes above 60" when it's clearly much warmer in the boat... I try and set it to 70. But it always says it's 60 so it won't kick on.... It can blow heat though and eventually I can get the thermostat then goes up a little bit... Any ideas?
 
Thanks guys. I will do the reset today. Not sure why that didn't come to mind but thanks so much for at least a start! By a few degrees I should have clarified about 10,... It looks like it can be moved easily but I didn't know you could manually adjust. Will try that after the reset.
 
It is in the manual. I don't remember specifically but of you don't have the manual you can get it online. I am sure you hold two buttons for some period of time until something flashes but don't remember specifics. When I find I will try to post because I need it also.
 
Thank you... I'm looking it up now... Will let you know if I find something
 
But the truth is that today there is a wide range of products of choice of packaging products on the market, ranging from colors to technical characteristics. And if it will be easy for the user to determine the design, then the internal features are not so simple. And with some materials from https://www.airconservicingsingapore.com/installation/, I installed the air conditioner myself without calling any conditioner installation services. Consequently, the more opportunities there are for climate equipment, the more expensive they are, but in this case, the comfort and quality of the microclimate will be higher.
 
This AC system can give you a lot of trouble if you don't really know how to adjust or repair them. Sometimes it's better to give up and call someone who knows better than you to solve your problem. When I installed my hvac tampa system, I chose to look for a good team of people to install it. Living in Florida is heaven on earth, but you also have to be careful to keep this system going for up to 20 years. But with such temperatures, it is almost impossible to stop the AC from time to time.
 
I actually had this happen on the MSR AC unit - I thought the relay failed in the pump control box but oddly the compressor continued to run. It was like 60 in that room. There was nothing on the controller that would change anything. The cheapest, easiest thing to do is to turn off all power to the HVAC systems which I did - waited ten minutes then powered back up and it has operated normally since; that was about three months ago.
Regarding temperature control, my solon HVAC unit just could not track to the setting on the controller. The temperature probe was installed on the condensate drain pan partially exposed to the return air on the unit. So I took an air temperature reading where that probe was installed and by golly it was tracking to that air temperature which was not indicative of the room temperature. So, I relocated that probe (it has a very long wire) in the corner next to the solon power panel and the system started to condition the area much better. That corner is not exposed by the sun nor direct air flow from the HVAC system.
Two super easy things to do at, if you can believe it, zero cost.
 
ttmott said:
I actually had this happen on the MSR AC unit - I thought the relay failed in the pump control box but oddly the compressor continued to run. It was like 60 in that room. There was nothing on the controller that would change anything. The cheapest, easiest thing to do is to turn off all power to the HVAC systems which I did - waited ten minutes then powered back up and it has operated normally since; that was about three months ago.
Regarding temperature control, my solon HVAC unit just could not track to the setting on the controller. The temperature probe was installed on the condensate drain pan partially exposed to the return air on the unit. So I took an air temperature reading where that probe was installed and by golly it was tracking to that air temperature which was not indicative of the room temperature. So, I relocated that probe (it has a very long wire) in the corner next to the solon power panel and the system started to condition the area much better. That corner is not exposed by the sun nor direct air flow from the HVAC system.
Two super easy things to do at, if you can believe it, zero cost.
Click to expand...

I have done the same on this boat and the last 2 by moving the temperature probes away from the unit and relocating them to get a true feel for the temperature in the area. Works like the HVAC at home.

Bennett
 
ttmott said:
I actually had this happen on the MSR AC unit - I thought the relay failed in the pump control box but oddly the compressor continued to run. It was like 60 in that room. There was nothing on the controller that would change anything. The cheapest, easiest thing to do is to turn off all power to the HVAC systems which I did - waited ten minutes then powered back up and it has operated normally since; that was about three months ago.
Regarding temperature control, my solon HVAC unit just could not track to the setting on the controller. The temperature probe was installed on the condensate drain pan partially exposed to the return air on the unit. So I took an air temperature reading where that probe was installed and by golly it was tracking to that air temperature which was not indicative of the room temperature. So, I relocated that probe (it has a very long wire) in the corner next to the solon power panel and the system started to condition the area much better. That corner is not exposed by the sun nor direct air flow from the HVAC system.
Two super easy things to do at, if you can believe it, zero cost.
Click to expand...
When you are experimenting with the probe location it is useful to have candy thermometer to get quick accurate reads of the room temperature in area where you want the reading to correspond to the tstat setting. We always wanted a cold sleeping area so we could stay comfortable under blankets. We found a sensor location that allowed the berth to cool down to 55 degrees which was right for us. Candy thermometers also allow you to check the Delta T of the output to insure it is within spec for the AC unit.
 
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