Reply
 
Thread Tools Search this Thread Display Modes
 
Old 02-08-2018, 11:02 PM   #1
Veteran Member
 
City: Friday Harbor
Vessel Name: Pandion
Vessel Model: Nordhavn 46
Join Date: Aug 2013
Posts: 84
webasto HL 32 D heater troubleshoot

I am trying to get the webasto HL 32 diesel heater going on a boat we recently bought. Looking through the records I can tell the heater has not worked since 2011. I was able to find a rebuild kit and installed a new burner mat, as well as replacing the flame sensor and thermostat overheat sensor. I also bought a second control panel that I found on ebay..So now the heater starts and works just like new until 8 minutes into the heat cycle when for some reason it shuts down the fuel pump and then shut's itself off.
All I have to do is turn the heater switch off then back on again and it runs fine for another 8 minutes, before shutting down again. I have checked the voltage at the heater and I have about 12.50 so I don't think it is a voltage problem.. The good people at Sure marine have been very helpful but have pretty much given up by now...any ideas?
thanks
bcarli is offline   Reply With Quote
Old 02-09-2018, 01:24 AM   #2
Guru
 
tiltrider1's Avatar
 
City: Seattle
Vessel Name: AZZURRA
Vessel Model: Ocean Alexander 54
Join Date: Aug 2017
Posts: 4,308
Call sure marine in Seattle.
tiltrider1 is offline   Reply With Quote
Old 02-09-2018, 02:00 AM   #3
Senior Member
 
wwestman's Avatar
 
City: Bellingham, WA
Vessel Name: Excellent Adventure
Vessel Model: 1995 Jefferson Ker Shine 45
Join Date: Apr 2015
Posts: 395
Is it got a water pump and is that working? If so then try bleeding the air out of the circulating system. Sounds like it is getting too hot and shutting itself down.
wwestman is offline   Reply With Quote
Old 02-09-2018, 04:23 AM   #4
Veteran Member
 
crashley's Avatar
 
City: hazelwood north
Vessel Name: GULL
Vessel Model: WW2 Work boat
Join Date: May 2014
Posts: 43
Does is show any fault codes
Try running for 4 minutes and then shut it down and then restart and see if it runs for 8 minutes or only 4 it may give an indication of the problem being temp or timer related
is it getting enough air flow ie is the inlet or outlet restricted try without the outlet duct fitted
crashley is offline   Reply With Quote
Old 02-09-2018, 08:22 AM   #5
Senior Member
 
Westiculo's Avatar
 
City: Boston
Vessel Name: Rose Mary
Vessel Model: 42 Grand Banks Motoryacht - 1985
Join Date: Feb 2017
Posts: 271
man, these things can be tough. I agree with wwestman; I had one of their coolant heaters that kept shutting itself down. The problem was the circulation pump wasn't pumping enough fluid through the furnace so it would overheat. Is the HL 32 an air heater? If so, it could be the fan that's blowing air over the heat exchanger is crapping out, or obstructed somehow. How's your air flow?

You have two different air circuits in there, one where air goes in to feed the combustion then is exhausted out the boat, and the other where there is an air intake to blow over the heat exchanger and then out into the cabin. I would take a shop vac, put the hose on the blower side of the vacuum, and try forcing a larger volume of air across the heat exchanger and out into the cabin (NOT through the combustion side). If this works, than you know there's not enough air flowing over your heat exchanger and your cabin supply fan is crapping out.
Westiculo is offline   Reply With Quote
Old 02-09-2018, 04:11 PM   #6
Guru
 
C lectric's Avatar
 
City: Gibsons, B.C., Canada
Vessel Name: Island Pride
Vessel Model: Palmer 32'
Join Date: Oct 2007
Posts: 4,414
check if there is an air filter installed on the return side that is plugging. Check if the return is a hose that it is not crimped or squashed partly shut. If either is the case it may restrict the air flow enough that , as already suggested, the exchanger is overheating.
Many units like this must have a VERY good flow of cabin air or the exchanger overheats and the unit shuts down.

You might also check the actual voltage at the FAN itself. If full V is not getting to the fan so it runs a bit slow the same wil occur.

A cranial cramp made me suggest this. Check the exhaust pipe and outlet for any restrictions. Collapsing pipe/hose or bug plugs, nests, are a common cause of heater trouble in RV and the units are not all that different. Again if the exhaust is restricted the combustion chamber/heat exchanger will get too hot and cause a shut down.
C lectric is offline   Reply With Quote
Old 12-25-2023, 07:04 AM   #7
Newbie
 
City: Castelsarrasin
Join Date: Dec 2023
Posts: 1
Webasto hl 32

Hi
I've got the same problem with my webasto hl32, cuts out after about 8 minutes The air intake pipe had been removed by previous owners, so guessing they did this to try and fix the problem
Mine is partly dismantled, on the kitchen table, waiting for me to fix it!!!!!!!!!!!!
BOATYSAND is offline   Reply With Quote
Old 12-25-2023, 09:40 AM   #8
Guru
 
tiltrider1's Avatar
 
City: Seattle
Vessel Name: AZZURRA
Vessel Model: Ocean Alexander 54
Join Date: Aug 2017
Posts: 4,308
Quote:
Originally Posted by BOATYSAND View Post
Hi
I've got the same problem with my webasto hl32, cuts out after about 8 minutes The air intake pipe had been removed by previous owners, so guessing they did this to try and fix the problem
Mine is partly dismantled, on the kitchen table, waiting for me to fix it!!!!!!!!!!!!
Call Sure Marine in Seattle. They can advise and ship you parts.
tiltrider1 is offline   Reply With Quote
Old 12-25-2023, 04:06 PM   #9
Veteran Member
 
City: Friday Harbor
Vessel Name: Pandion
Vessel Model: Nordhavn 46
Join Date: Aug 2013
Posts: 84
There is a probe that is design to turn the heater off if the fuel gets shut off
It about 2 inches long about the width of a pencil (from memory )
I bought a new one installed it and my heater still cut out
I finally sent the whole heater to sure marine they replaced the probe and it worked fine. Told me the new probe they sent me was defective
Worked for years
bcarli is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Trawler Port Captains
Port Captains are TF volunteers who can serve as local guides or assist with local arrangements and information. Search below to locate Port Captains near your destination. To learn more about this program read here: TF Port Captain Program





All times are GMT -5. The time now is 02:43 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012