jonolaw
New Member
Hi - I have searched for this problem but can find nothing similar - if I have missed a previous thread I apologise.
Anyway my 3yr old daughter kindly left the heater on programmed mode probably an hour or so per day over the winter so when I went to the boat to check up one day, the diesel had run out and obviously the heater was not on. Looking on the bright side the boat was not damp!
Ever since then I have not been able to get the heater to fire up - I have to admit to only recently trying in vain to fix the problem.
The symptoms are, when I press the controller to start it up ( it’s a 7 day digital display controller on a 2001 D2), it goes onto high speed fan immediately, no clicking of pump and does not fire up after the preheating period. (typically should be around the 3 minute mark I believe) So I get cold air coming through the ducts and it would appear that if I left it, it would run this way until the timer switches it off.
Some background is:
Typical system voltage is around 13.7volts - and that does not drop much at all during the start up cycle. This has just made me wonder if perhaps the glow plug has gone and as such this is why there is no voltage drop during start up....?
As it had run out of fuel in winter I wondered if that could be the problem, so I have checked the fuel line and sure enough it had air in it between the pump and the heater. So took the pump off and checked fuel could get to the pump which it can. This made me wonder why fuel is not being pumped to the heater. So I checked the voltage on the pump and found that when I switch the heater on I get 13.7 volts at the pump, however I do not seem to hear any clicking of the pump at all, not even once. This I assumed meant the pump was faulty. So I ordered a new pump and have found the same issue, even the new pump does not pump fuel during the start up. So clearly the pump is not faulty.
So I wondered what may be wrong and have reverted to the old pump again as it appears not to be faulty. Having read a few forums I see that to force fuel through I should momentarily on/off connect the pump to 12v to get it to pump fuel through, after doing this and bleeding to the input of the heater I think I now have fuel at the heater.
I tried the start up again and sure enough I just get the same old start up of high speed fan etc… no clicking of pump and no heat after the start up sequence. So no further forward really.
The interesting thing (if any of this is interesting!) is during the start up when I get 13.7v on the pump connector if move the plug on and off the pump even then it does not click or pump anything. However if I take another lead to the pump and connect directly the a battery then I get the clicking of the solenoid in the pump and a little squirt of fuel. So I wonder why when the lead from the heater is connected and I start up the heater and I get 13.7v on the pump connector I do not get any clicking and fuel being pumped. Not knowing how the fuel metering works on these heaters I am a bit lost!
Anyway I am getting stuck for ideas…. Any help would be much appreciated. Also does anyone have servicing instructions for these units?
Many thanks in advance….
Jonathan
Anyway my 3yr old daughter kindly left the heater on programmed mode probably an hour or so per day over the winter so when I went to the boat to check up one day, the diesel had run out and obviously the heater was not on. Looking on the bright side the boat was not damp!
Ever since then I have not been able to get the heater to fire up - I have to admit to only recently trying in vain to fix the problem.
The symptoms are, when I press the controller to start it up ( it’s a 7 day digital display controller on a 2001 D2), it goes onto high speed fan immediately, no clicking of pump and does not fire up after the preheating period. (typically should be around the 3 minute mark I believe) So I get cold air coming through the ducts and it would appear that if I left it, it would run this way until the timer switches it off.
Some background is:
Typical system voltage is around 13.7volts - and that does not drop much at all during the start up cycle. This has just made me wonder if perhaps the glow plug has gone and as such this is why there is no voltage drop during start up....?
As it had run out of fuel in winter I wondered if that could be the problem, so I have checked the fuel line and sure enough it had air in it between the pump and the heater. So took the pump off and checked fuel could get to the pump which it can. This made me wonder why fuel is not being pumped to the heater. So I checked the voltage on the pump and found that when I switch the heater on I get 13.7 volts at the pump, however I do not seem to hear any clicking of the pump at all, not even once. This I assumed meant the pump was faulty. So I ordered a new pump and have found the same issue, even the new pump does not pump fuel during the start up. So clearly the pump is not faulty.
So I wondered what may be wrong and have reverted to the old pump again as it appears not to be faulty. Having read a few forums I see that to force fuel through I should momentarily on/off connect the pump to 12v to get it to pump fuel through, after doing this and bleeding to the input of the heater I think I now have fuel at the heater.
I tried the start up again and sure enough I just get the same old start up of high speed fan etc… no clicking of pump and no heat after the start up sequence. So no further forward really.
The interesting thing (if any of this is interesting!) is during the start up when I get 13.7v on the pump connector if move the plug on and off the pump even then it does not click or pump anything. However if I take another lead to the pump and connect directly the a battery then I get the clicking of the solenoid in the pump and a little squirt of fuel. So I wonder why when the lead from the heater is connected and I start up the heater and I get 13.7v on the pump connector I do not get any clicking and fuel being pumped. Not knowing how the fuel metering works on these heaters I am a bit lost!
Anyway I am getting stuck for ideas…. Any help would be much appreciated. Also does anyone have servicing instructions for these units?
Many thanks in advance….
Jonathan
