Webasto Diesel Furnace model? R29

[PuffinStuff]

We're having an issue with our furnace, but the literature I have doesn't call out it's model type and I'm not down at the boat presently. Does anyone out there know the model furnace installed on an R-29? The issue is we're getting air circulation, but it's not firing, so no heat. It looked like the fault code was the green light blinking one long, three short. We were plugged into shore power at the time, so I don't think there would be a voltage problem. Thoughts on where to begin? Do these units have a reset button on them?

Thanks,

Paul

 

[coreychamness]

ranger tug puts in 3900 in all models

 

[PuffinStuff]

Thanks so much!

 

[Helgerso]

This may sound simple and you probably checked - but make sure you have enough diesel on board. If you're well below a quarter of a tank I've had issues with the fuel feed which results in the furnace firing but no heat.

 

[knotflying]

Here are the error codes

13.1 Error Code Output
NOTE: An error code is generated on the control element indicator light after an error has occurred. When determining the generated code, there will be a series of 5 fast flashes after which, the error code will be generated by a sequence of long flash pulses, count only the long flash pulses to obtain the code. Error codes are shown in the table below.
If the heater is fitted with a combination timer, an error message will appear on the display of the timer after a fault occurs. If the control element is used, the error number is indicated by the indicator light flashing:

F 00 Control unit error / incorrect parameter set / warm start recognition
F 01 No start (after 2 attempts to start) / no flame formation
F 02 Flame failure (repeated more than 3 times)
F 03 Under voltage or over voltage
F 04 Premature flame recognition
F 06 Temperature sensor interrupt or short circuit
F 07 Metering pump interrupt or pump short circuit
F 08 Fan motor interrupt or short circuit or overload or blocked
F 09 Ceramic glow pin interrupt or short circuit
F 10 Overheating: Resulting in permanent heater fault lock-out
F 11 Overheating sensor interrupt or short circuit
F 12 Heater lock-out
F 13 Heater lock-out permanent
F 14 Overheating sensor incorrect position
F 15 Set point generator interrupt

Mike Rizzo

 

[knotflying]

I posted the codes above. As one of the former posts said, make sure you have enough fuel. On mine if I go below 36 gallons it won't pick up fuel. Check your filter. Check to make sure your pump is thumping. If you had a few unsuccessful start ups the unit will lock out. You need to remove both fuses, wait one minute and reinstall. that will reset the unit. if you have a bum glow plug things will get a bit more complicated. If you give me your e-mail I can send you the service and maintenance manual in PDF format.

Mike Rizzo

 

[PuffinStuff]

Thanks for all of the help and advice. I observed five flashes followed by one long flash, so the error code related to this seems to be no flame formation. Can you tell me where the fuses for the furnace are typically located? I'll check those first. We just filled up recently (with all this affordable diesel!), so I don't believe it's a fuel quantity problem. Does the furnace have it's own fuel filter or does it utilize the engine's main filter? Probably a dumb question, but had to ask as just recently had that serviced.

 

[knotflying]

I am not sure where the fuses are on the 29. If you had it factory installed it may be noted on the fuse layout diagram. I am sure Kenny or Andrew can tell you where they are.
There is a black box with the pump in it and the filter is in there as well. Like I said, it could be several reasons for the flame not starting so go through each of the possibilities one at a time with the easiest first.
Here is what is says in the service manual for a F1
No start (after 2 starting attempts)/ no flame formation - Check fuel supply (tank empty, lines blocked) Clean burner insert, replace flame sensor


Keep us informed of how it is going.

Mike Rizzo

 

[Gin]

The fuses for our Webasto on our 2013 RT 27 sit behind the helm in a special in-line fuse box. It is a small square plastic box, holds two fuses from the looks of it, and has a "Webasto" label taped to the box.

 

[Irish Mist]

I would say if the fan is running that the fuse is ok

 

[RossnBetty]

[/quote] I observed five flashes followed by one long flash, so the error code related to this seems to be no flame formation. Can you tell me where the fuses for the furnace are typically located? I'll check those first. We just filled up recently (with all this affordable diesel!), so I don't believe it's a fuel quantity problem. Does the furnace have it's own fuel filter or does it utilize the engine's main filter? .[/quote]

This was the same warning flash code we received with 54 gallons of fuel; after a fuel up our heater worked fine.
You will find the Webastco fuel filter under the cockpit star board gullwing right next to the Webastco heater.. You will find it easy to change. I have as spare filter now :roll:

Ross

 

[PuffinStuff]

Thanks again to all. I'll check this all out later this week and see what I can learn. Will report back then.

 

[Silver Mist]

Hi there, I had problems with my webasto furnace on my r29 a few months ago. I was getting pretty much the same flame out error code as you are. I live on the North Coast of BC so am pretty far away from anyone who could work on my furnace so I ended up taking it out and taking it apart to figure out what was wrong. It comes off its mounts with just a couple fastners and the fuel line and the power are easy to remove. I ended up taking it out and dismantling it on some cardboard on my table. When I got it apart the burner was pretty dirty and with some internet searching and a talk with a webasto technician figured out I needed a new burner. I was able to order a burner kit from Sure Marine (http://www.suremarineservice.com/1313124a.aspx) and put it back together and it lit right up and has worked fine ever since.

After it failed I found out that the furnace is better when it runs hot for a short period of time rather than low and continuous like I had been running it before. Now I turn it on to heat up the boat then maintain the heat with a couple small electric heaters when I am on the boat (at the dock on shore power of course).

If you do attempt the repair it is not that difficult I would just take lots of pictures along the way and keep track of where each fastner came from.

 

[knotflying]

Yes, running hot is recommended. I run it hot to start and then cool it down a bit, but before turning it off I run it hot again. I open a window if it gets too hot.

 

[PuffinStuff]

The update on this. I finally figured out that the aft auxiliary fuel cell is the one that supplies the furnace and we had transferred all but a couple of inches back in fall when we needed to access the stern thruster and had to nudge it over. I suspect we left the furnace on low and left the boat and it emptied the remainder of the fuel in the smaller tank.

I filled up the secondary tank yesterday, but unfortunately it wasn't as simple as just firing it up. I think the system that ignites the furnace is out or the pump that supplies the fuel is. I'll keep tinkering and report back when I learn more.

 

[knotflying]

If I remember correctly after maybe 5 tries with no ignition the unit goes into fault mode and you need to do a master reset by removing both fuses to the unit. Wait a minute and reinstall. Then try again. If it is a long run to the unit from the tank it could take a couple of resets before fuel finally gets there. So a coup[le of resets may be required. It may also be possible that you picked up junk at the bottom of the tank. Does the pickup have a filter on it? if so check that out. And also check out the regular filter. If the pump is pumping you can also disconnect the hose going to the unit after the pump and see if fuel is pumping out. If it is not, either it has not gotten there yet or one of your filters is clogged. You should also be able to see fuel pumping through the filter that is near the pump unit.

Let us know how it goes.