Heat Does Not Come On 280EC

barthbc

Tried to set the heat at 72 and it would not come on.  Normally it remains at 72 and a 5 degree window choosing whether ac or heat is needed.  The ac works fine but the heat doesn't even attempt to come on.   Troubleshoot says to lightly tap the valve with a rubber mallet.  Haven't tried looking for the valve on the unit.  Any help?

barthbc

I'll fiddle with it today.  I don't know how to "accept" acknowledge answers?

Weber

I couldn't figure out how to reply to your pm, so I'll write it here. With the system off (no display but power to the unit) press and hold the power button until the letter p shows on the display. It will then show p-1 and then it will show either 0, 1, or 2. 0 is auto, 1 is cool only, and 2 is heat only. Use the temp up and down buttons to change the setting, after you have it selected to what you want press the fan button to move on the the next part of programming. Press the power button to save the changes and exit the programming mode.

Dream_Inn

Have you tried turning the temp up higher?  Did you notice if the display showed it in heat mode?  (little light next to sun picture)  You may also have to change some internal settings for reverse cycle to come on which I'm betting is the case.  Also, are you sure it has reverse cycle?

OldDogNewTrix

Friends boat did the same thing in reverse. For some reason the setting got changed to Heat only. There's a combination of buttons to push/ hold to reset it to do both. It should be explained in the manual.

Weber

In the setup menu you can select which mode you want, heat only, ac only, auto. You can also change the differential.

MarkB

1) Is your water running through the AC? Go outside and see if there is a continuous stream of water about 1/2" diameter coming out one of the drains.  If not, you probably need to prime the air con pump. On my boat the valve and pump is under the mattress in the aft cabin. Lift the mattress and you should see a covered port. Check if the valve is open. If not I'm not sure how you prime without sinking your boat! LOL! But my dealer did it once before for me, so it is possible.

2) Check your manual and read the service settings. Go into the menu and make sure everything is okay. You may want to reset everything to factory default.

 

Dream_Inn

Mark, priming can be done usually two ways.  Either take her out for a ride with that seacock open or, use a hose and push water back thru where it usually comes out.

barthbc

According to the manual there are two types of controls.  Mine is the smaller.  The unit has water flow and the ac is working fine.  I can set the temp to 85 and the heat does not come on indicated by the red led lit up and heat coming out.  Don't believe there is any programing to do, the unit chooses heat or ac by the temp you select.  Blower runs fine just the heat will not cycle on??

Dream_Inn

maybe you can tell us what unit you have.  I don't know of any that don't have settings you can't change.  You usually need to hold the power button on for 5 seconds (or another button during power on) and it will appear at the first setting.  But you need to have the list of the settings to know which one to change.

Weber

Take a picture of the control, but if the control has a indicator light with a sun or fire image, I can tell you how to fix in 30 seconds. I had to figure mine out this spring as mine was set for ac only as well.

OldDogNewTrix

You are correct about the unit deciding whether to heat or cool depending on the temperature setting BUT you also have to have it programmed to do both for that function to work.

kneedeep

I agree with old dog. im pretty sure that I also have a heat only mode, a cool only mode & heat/cool. I think you need to program it to heat as others have said.

barthbc

Going today.  Will fiddle with it and take pictures.   Thanks. Ben

MarkB

Google the manual on your cell and read it.

barthbc

Thanks for all the input.  It was Program problem.  Evidently the dealer disconnected the batteries in storage and it lost program over time.   Did exactly as WEBER stated and all is fine.  Thanks again..... 

OldDogNewTrix

Glad to hear it is working now.

raybo3

Nice easy free fix.....lol