Does the coolant-into-the-heater loop have its own impellor or is it the standard engine coolant pump? Is it shot? Did the tank suddenly stop producing hot water, or slowly get cooler? How is it when hooked to shore power and is AC heated? It's obviously not an element if heating from shore power is still OK, so I'd look at the hoses, and water pump.
Rob -----Original Message----- From: cnc-list-boun...@cnc-list.com [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Rich Knowles Sent: Friday, August 24, 2012 9:42 AM To: cnc-list@cnc-list.com Subject: Re: Stus-List Hot water heater Dwight: I was referring to the engine coolant thermostat. If that fails open, the engine water temperature will be much lower than normal and so will any heat exchanged water. I have no idea what other mysteries you may have in your particular system. A second thermostat would be unusual. Rich (mobile) On 2012-08-24, at 9:25, dwight veinot <dwightvei...@hfx.eastlink.ca> wrote: Rich The hot water on my boat is also heated by the engine coolant, which passes through a coil in the hot water tank. I have installed a manual valve in the coolant line from the engine to the salt water heat exchanger. I can adjust that valve to control the flow of coolant to the hot water tank, mostly I leave it full open to the heat exchanger but when I want faster hot water I adjust it to force more coolant through the heater and less through the engines salt water cooled heat exchanger. I was not aware that a thermostat controlled engine coolant flow to the hot water tank but maybe my boat has such a setup which was not functioning when I first got the boat. I did not produce much hot water in the tank by running the engine until I installed that manual valve which allowed me to divert more engine coolant to the coil in the hot water tank. Maybe I had a malfunctioning thermostat in the line but it I did not see one. Based on your advice to Greg, I'll look harder now because that would be preferable to using the manual valve. Is the thermostat that would control this usually found on the engine or the hot water tank? Thanks Dwight Veinot C&C 35 MKII, Alianna Head of St. Margaret's Bay, NS -----Original Message----- From: cnc-list-boun...@cnc-list.com [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Rich Knowles Sent: August 23, 2012 11:35 PM To: cnc-list@cnc-list.com Subject: Re: Stus-List Hot water heater Thermostat? Rich (mobile) On 2012-08-23, at 22:57, "Greg Sutherland " <bluenosesail...@hotmail.com> wrote: We are anchored off of Masons island in Mahone Bay and just finished a nice bbq supper. Have been running the diesel for a good 60 minutes to charge the batteries and electronics. when we turned the tap to clean the dishes the water is lukewarm. It typically takes 10 to 15 and the water will scald you. Any ideas what the issue may be? Thanks group Greg 87' 33 mk2 Sent wirelessly from my BlackBerry _______________________________________________ This List is provided by the C&C Photo Album http://www.cncphotoalbum.com CnC-List@cnc-list.com _______________________________________________ This List is provided by the C&C Photo Album http://www.cncphotoalbum.com CnC-List@cnc-list.com ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2012.0.2197 / Virus Database: 2437/5219 - Release Date: 08/23/12 _______________________________________________ This List is provided by the C&C Photo Album http://www.cncphotoalbum.com CnC-List@cnc-list.com _______________________________________________ This List is provided by the C&C Photo Album http://www.cncphotoalbum.com CnC-List@cnc-list.com The information contained in this email is intended only for the individual or entity to whom it is addressed. Its contents (including any attachments) may contain confidential and/or privileged information. If you are not an intended recipient, you may not use, disclose, disseminate, copy or print its contents. If you received this email in error, please notify the sender by reply email and delete and destroy the message. L’information contenue dans ce courriel est destinée exclusivement aux personnes ou aux entités auxquelles le courriel est adressé. Le contenu de ce courriel (y compris toute pièce jointe) peut renfermer de l’information confidentielle et / ou privilégiée. Si ce message ne vous est pas destiné, vous ne pouvez utiliser, divulguer, diffuser, copier ou imprimer son contenu. Si vous avez reçu ce courriel par erreur, veuillez aviser l’expéditeur en lui faisant parvenir une réponse. De plus, veuillez supprimer et détruire le message. _______________________________________________ This List is provided by the C&C Photo Album http://www.cncphotoalbum.com CnC-List@cnc-list.com
