Pulling my hair out with restarting Webasto diesel heater…
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Pulling my hair out with restarting Webasto diesel heater
The issue:
Webasto diesel heater keeps restarting, heat going on and off
My setup:
Webasto Air Top 2000 ST Diesel 12V
Mounted underneath campervan
Burner inlet 50cm tube + air filter
Burner outlet dual muffler
30cm 60mm hose on main air inlet, pulling air from outside, no kinks
1m 60mm insulated hose on main air outlet, going through bulkhead in the floor, no kinks
Webasto fuel pump with damper hooked into main diesel tank, no bubbles in fuel line
Webasto Rheostat control
Webasto internal temperature sensor
Victron Orion 24/12-20 non-isolated (12.5V out non adjustable)
Symptoms
Starts up fine, itty bitty white smoke then colourless, nice and hot air inside
Dies down, heat slowly decreases, goes to cold air, winds all the way down
Starts back up with full heat
Repeat
NO ERROR MESSAGES :(
What I've done so far
Redid all the 60mm air lines, made it a lot shorter and removed some kinks, this seems to make the cycle of starting up and shutting down a lot longer
Opened it up, no soot buildup at all
Changed to low CO2 setting (I'm >7000ft altitude now)
Tested at half power (longer startup and restart cycle)
Checked for power sag but constant 12.5V from the Orion
Checked all the thermal sensors, glowplug, fuel pump etc for correct resistance, all good
Hypothesis 1:
Unit is f'ed, everything around it works fine so must be the unit. Maybe software settings are wrong or electronics is faulty somehow.
Hypothesis 2:
Unit is overheating on the output side, it fails to regulate with full fan power so will just go into a cooling cycle. Webasto expects a higher voltage than 12.5V. With for instance \~14V (engine running battery voltage), the fan has 12% more voltage ~~to use 12% more current~~ and so can push ~~(1.12\*1.12=) 25~~ 12% harder. That might eliminate the overheating issue?
Hypothesis 3:
I am idiot
#lifestyle
source
The issue:
Webasto diesel heater keeps restarting, heat going on and off
My setup:
Webasto Air Top 2000 ST Diesel 12V
Mounted underneath campervan
Burner inlet 50cm tube + air filter
Burner outlet dual muffler
30cm 60mm hose on main air inlet, pulling air from outside, no kinks
1m 60mm insulated hose on main air outlet, going through bulkhead in the floor, no kinks
Webasto fuel pump with damper hooked into main diesel tank, no bubbles in fuel line
Webasto Rheostat control
Webasto internal temperature sensor
Victron Orion 24/12-20 non-isolated (12.5V out non adjustable)
Symptoms
Starts up fine, itty bitty white smoke then colourless, nice and hot air inside
Dies down, heat slowly decreases, goes to cold air, winds all the way down
Starts back up with full heat
Repeat
NO ERROR MESSAGES :(
What I've done so far
Redid all the 60mm air lines, made it a lot shorter and removed some kinks, this seems to make the cycle of starting up and shutting down a lot longer
Opened it up, no soot buildup at all
Changed to low CO2 setting (I'm >7000ft altitude now)
Tested at half power (longer startup and restart cycle)
Checked for power sag but constant 12.5V from the Orion
Checked all the thermal sensors, glowplug, fuel pump etc for correct resistance, all good
Hypothesis 1:
Unit is f'ed, everything around it works fine so must be the unit. Maybe software settings are wrong or electronics is faulty somehow.
Hypothesis 2:
Unit is overheating on the output side, it fails to regulate with full fan power so will just go into a cooling cycle. Webasto expects a higher voltage than 12.5V. With for instance \~14V (engine running battery voltage), the fan has 12% more voltage ~~to use 12% more current~~ and so can push ~~(1.12\*1.12=) 25~~ 12% harder. That might eliminate the overheating issue?
Hypothesis 3:
I am idiot
#lifestyle
source
| 1,000 mlx | |
| 3 | |
| 0 |