Air/Heat system not heating.

tobnpr said:
I would suspect a faulty or sticking reversing valve.
Tap it with the handle of a screwdriver...
Click to expand...

That is the solution 90% of the time in this circumstance.

It is advisable to twice a year run the AC on heat for a few minutes to keep the valve loose.

Giving it a knock with a hammer handle, a few taps should shock it loose while in the heat cycle.
 
Hampton, slow down on the eggnog! We're just lucky we aren't winterized and laid up till April...

Moose, let us know when you get it going and what you did that fixed it. Reversing valve makes sense.
 
Now I have to whack "what" with a hammer or screwdriver. This thing has been running great for 4 years, ac or heat. David Paul in his post sent me a diagram of the unit but there is no reversing valve on it. Is the bypass valve the same thing? Currently when I put it on heat the compressor will only go on for about 10 seconds before shutting down. Access is OK through 2 panels, but I don't know what to "whack"? Have tried to contact Cruisair but no response yet. Will try and "whack" this w/e. Details later.
 
Well, it's over! Went to the boat this am, and did a little "whacking" on the unit. Not sure what I "whacked" with screwdriver handle, but its now working and recycling as it should. Temp set at 55 and now a happy camper. Just in time for record lows this coming week. Thx everyone for your insight and info.
 
Three pages of threads, and no one has a diagram of where or what the reversing valve is?
I've been tapping on mine, but it hasn't helped yet. Mine will run for a bit, then quit. restarts 4 more times, and then displays LO PRESSURE. It is not water flow. That;'s good. The feed to the coils is very hot, and the return is not so hot. I'll keep tapping, but I'm starting to think that the valve coil may be bad, or not getting voltage.

This link has the diagram on page 12 or so
http://www.cruisair.com/sheets/L-0881.pdf
 
370Dancer said:
Three pages of threads, and no one has a diagram of where or what the reversing valve is?
I've been tapping on mine, but it hasn't helped yet. Mine will run for a bit, then quit. restarts 4 more times, and then displays LO PRESSURE. It is not water flow. That;'s good. The feed to the coils is very hot, and the return is not so hot. I'll keep tapping, but I'm starting to think that the valve coil may be bad, or not getting voltage.

This link has the diagram on page 12 or so
http://www.cruisair.com/sheets/L-0881.pdf
Click to expand...

csroptions.jpg


Good luck with the tapping.
 
That right there is some seriously funny stuff.
 
Have received 2 responses from Cruisair support on email. Some others might be interested in this info. How do I share this on the site?
 
Moose said:
Have received 2 responses from Cruisair support on email. Some others might be interested in this info. How do I share this on the site?
Click to expand...

Copy and paste.
 
I guess there could have been a problem with the reversing valve but if it started within 10 seconds I still think the logic was sensing a open pressure switch , probably the high side. Normally if a reversing valve hangs up part way it would give you equal pressures which wouldn't cause either pressure switch to open. Tapping the compressor wouldn't have helped in that case either. One possibility could be you had a loose or resistive connection on the pressure switch and in tapping you might have corrected it ? What you might do, just to be safe is unplug the pressure switches and then replug them. They are the top of the unit and the low pressure has two white wires and the high pressure has two yellow wires. Thanks for the info and hopefully you won't have the problem again.

Thank you,
Carter


<mrm822@comcast.net>
01/07/2010 10:03 PM
To carter till <carter.till@dometicusa.com>
cc
Subject Re: From Www.cruisair.com, To service







Carter, appreciate response. However there were no error codes displayed at any time. Fan speed never changed. When the unit would come on, it lasted only about 10 seconds, then would shut off. After about 10 minutes it would do the same again and again, etc. Temp was set at 55 at all times. Trying to give you all I know. After tapping on the compressor with screwdriver handle with unit on heat, compressor started and continued to operate normally. As stated in first email, all filters were clean. There was water flow and air filter was clean as well. Let's get back to the "reversing" valve. Could it had have an obstruction of some sort and when I tapped it everything started working properly. I'm baffled but happy that all is working fine now. Maybe you can use this info with other customers. Thx.



----- Original Message -----
From: "carter till" <carter.till@dometicusa.com>
To: mrm822@comcast.net
Sent: Thursday, January 7, 2010 8:25:34 AM GMT -05:00 US/Canada Eastern
Subject: Re: From Www.cruisair.com, To service


Mr Manitt,
I'm sorry for the delay but I was out of the office for a couple of days. How long did the unit run before it started cycling ? If it was a few minutes I suspect airflow might have been the issue. In the heat cycle low airflow will result in high head pressure. Our SMX logic overlooks high head pressure in the heat cycle for quite a while in that you it won't shut the unit down and display HI PS but will cause the compressor to cycle. If the condition remains eventually it would shut down. The other safety, the low pressure switch, on opening, will cause the fan to drop to the lowest setting. This is in a effort to help the refrigerant pressure to increase. You wouldn't know anything was wrong unless you tried to increase the fan speed at which time you would see LO PS on the display. We put this program into the logic because it is natural for pressures to drop in the heat cycle with cold water and cold air on start up. But the compressor would continue to run for about 11 minutes . If the pressure switch resets the unit would resume normal operation. If not the compressor would start to cycle , 3 times, and then shut down and the display would read Lo PS. Since you didn't mention the fan speed decreasing I again would suspect the high pressure switch had opened causing the compressor to cycle. If you have further questions please email me or you can reach me by phone at my direct number (804) 559-6462 Mon thru Fri 8 am to 5pm eastern time.


Hope this helps,
Carter


<mrm822@comcast.net>
01/06/2010 08:26 PM
To carter till <carter.till@dometicusa.com>
cc
Subject Re: From Www.cruisair.com, To service









Carter, could you please give me some feedback on this reply. Others are waiting too. Appreciate it.


----- Original Message -----
From: mrm822@comcast.net
To: "carter till" <carter.till@dometicusa.com>
Sent: Monday, January 4, 2010 8:46:17 PM GMT -05:00 US/Canada Eastern
Subject: Re: From Www.cruisair.com, To service


Carter, thx for reply. Issue has been resolved. Unit was running when on "heating" for about 10 seconds then would shut off and recycle again. My boat is a 2004 SeaRay Sundancer, and thanks to my friends at Club SeaRay.com fixes came in. Cleaning air filters and water strainers, although both were clean. Someone else said that reversing valve was stuck and that gently tapping with a screwdriver handle would help. Not knowing where the reversing valve was, I just starting tapping whatever I could see on the unit. It worked! Now running like it always did. Temp set at 55. If you have input to this feel free to comment. I would be interested and so would my colleagues at Club Searay. Happy New Year.


----- Original Message -----
From: "carter till" <carter.till@dometicusa.com>
To: "joann brown" <joann.brown@dometicusa.com>, mrm822@comcast.net
Sent: Monday, January 4, 2010 9:12:10 AM GMT -05:00 US/Canada Eastern
Subject: Re: Fw: From Www.cruisair.com, To service


Mr Manitt,
I'm sorry for the delay in answering this but we have just returned from the holidays. If you will reply to this with more details I'll be glad to help you with your problem.

Thank you,
Carter


Joann Brown/Richmond/North America/Dometic
01/04/2010 09:00 AM
To Carter Till/Richmond/North America/Dometic@Dometic
cc
Subject Fw: From Www.cruisair.com, To service










Hello Carter,

Can you please help this owner out.

Thank You

JoAnn Brown
Warranty Administrator
Dometic Corporation
Environmental Division
Phone - 804-746-1313
Fax - 804-730-6781
email - joann.brown@dometicusa.com


----- Forwarded by Joann Brown/Richmond/North America/Dometic on 01/04/2010 08:59 AM ----- Cruisair Contact <sales@cruisair.com>
12/28/2009 05:50 PM
To service@cruisair.com
cc
Subject From Www.cruisair.com, To service













# Mike Manitt

address 1: 321 Summerset Lane
address 2:
Sandy Springs, GA 30328
US

mrm822@comcast.net
404-307-8355
404-307-8355

Information:
What size boat do you own? 26\\\'
What model is it? SunDancer
What make is your boat? Sea Ray
What year is your boat? 2004

Do you currently have Air Conditioning on your boat? yes

If so, what product and model number do you own? Cruisair self-contained ac/heat system

Do you currently have Refrigeration on your boat? no

If so, what product and model number do you own?

Customer comments:
Issues with unit not heating. If you can please reply to me I will send more details of the problem.
 
370Dancer said:
Three pages of threads, and no one has a diagram of where or what the reversing valve is?
I've been tapping on mine, but it hasn't helped yet. Mine will run for a bit, then quit. restarts 4 more times, and then displays LO PRESSURE. It is not water flow. That;'s good. The feed to the coils is very hot, and the return is not so hot. I'll keep tapping, but I'm starting to think that the valve coil may be bad, or not getting voltage.

This link has the diagram on page 12 or so
http://www.cruisair.com/sheets/L-0881.pdf
Click to expand...

Update on mine. Troubleshooting pointed to low freon. I put a little R22 in this morning, and it went right into heating mode, and has worked all day. So, maybe after 12 years, enough freon leaked out to cause this. Anyway, problem solved.
There is a rubber plug that provides electric to the solenoid for valve reversing. Perhaps the tapping is just making the connection, which may have oxidized over time
 
370Dancer said:
Perhaps the tapping is just making the connection, which may have oxidized over time
Click to expand...

Negative. Reversing valves RARELY if ever fail. Assuming the solenoid coil is good, 90% of reversing valve issues are due to refrigerant charge being low. Reversing valve piston movement requires large pressure differential which cannot exist if refrigerant charge is low.
 
Moose said:
Well, it's over! Went to the boat this am, and did a little "whacking" on the unit. Not sure what I "whacked" with screwdriver handle, but its now working and recycling as it should. Temp set at 55 and now a happy camper. Just in time for record lows this coming week. Thx everyone for your insight and info.
Click to expand...

OK - checked on the boat this afternoon and no heat in cabin,
1. No error codes.
2. Clean Filter
3. Good water flow from thru hull
4. Compressor runs.

I am willing to give the reversing valve a "whack" if I knew where it is and what it looks like. Took some pics so maybe someone can show me where to "whack".
 
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