Heater | Campervan handbook | Maverick Outdoors

The Webasto digital control has a dial you turn and press, and a quick-start button. The 12V button on the Clayton unit must be on.

Quick start. Press the quick-start button. It lights green and the heater starts with your last settings. Press it again to stop.
Or use the menu. Turn the dial to the heating symbol and press to select it.
Set the temperature. Turn the dial to the temperature you want and press to confirm.
Set how long. Turn the dial to choose the running time and press to confirm. The heater starts.
Give it a few minutes. The heater runs through a start-up cycle before warm air comes through. When you switch off it keeps blowing for a short while to cool down. That is normal, so leave the 12V on until it stops.

Eco, Normal and Boost modes: Eco is quietest and uses least fuel, Boost heats fastest.
The fan menu (lights blue) blows air without heating, in four speeds.
The timer menu sets start times in advance, up to three a day.
Keep the warm air outlet and the air intake clear of bags and bedding.
Never run the heater in a closed garage or while refuelling.

Why it matters

The heater burns a small amount of diesel from the van's own tank and uses only around 14 to 29 W of electricity for its fan and pump, so it can run all night on very little battery.

If the heater stops, the control shows a code. These are the ones you are most likely to see on the Air Top 2000 STC.

F01 or F02: no flame, or the flame went out. Most often low fuel. The heater cannot draw from the tank when it is below about a quarter full. Fill up and try again.
F03: voltage too high, or code 84: voltage too low. Check the leisure battery level and charge it if needed.
F10: overheated. Check nothing is blocking the warm air outlet or the air intake, let it cool, then restart.
F12: heater locked out. After several failed starts in a row the heater locks itself as a safety measure. Do not keep retrying. Contact us and we will talk you through the reset.
Any other code: note it down and get in touch.

Why it matters

Repeated start attempts pump fuel into the heater without burning it. The lockout stops that building up, which is why it needs a deliberate reset and not another press of the button.

A little regular running keeps a diesel heater healthy.

Run the diesel heater for at least 15 to 20 minutes once a month to prevent carbon build-up.
Check the fuel filter, and clean or replace it if necessary.
Inspect the exhaust and intake pipes for blockages, cracks or corrosion.
Keep the air vents and ducting free from dust and obstructions.
If the heater will not be used for a long period, consider adding a diesel fuel stabiliser to prevent gelling in cold temperatures.

Why it matters

Diesel heaters burn cleanest when they run hot. Short runs and long idle spells leave soot behind, and a monthly 15 to 20 minute run burns it off before it builds up.