Heater tries to start for minutes, then shows E-10

Why does my heater try to start for minutes and then show E-10?

The heater tries to light, fails, tries once more and then gives up. Dieselheat’s guide says the whole cycle takes about 6 minutes for the 2 attempts, then the heater locks out with E10. Manual The B2010 manual and the Hcalory M98 manual both define E-10 as two failed ignition attempts, and the Vevor XMZ manual calls it a failed secondary start-up. Manual

Dieselheat names three likely causes: no fuel, insufficient power, or no air flow. Manual The other manuals mostly point at fuel:

• B2010: blocked fuel circuit, poor fuel intake, stuck fuel pump, or a blocked burner screen. Manual
• Vevor XMZ: check that the fuel pump works and that the fuel fittings are not waxed up or blocked. Manual
• Hcalory M98: tank short of fuel, pump stuck, bubbles in the fuel circuit, poor power supply or a fuel problem. Manual
• OnTrack: adds the screen at the glow plug, a fan that does not move freely, blocked combustion intake or exhaust, and oxidised power connections. Manual

Which causes did owners actually confirm?

Counts are owners who reported E-10, the cause and the fix, in threads that were read in full. Owners

Fuel delivery leads, which matches the manuals. The two air cases were a clogged add-on intake filter in hard frost and an exhaust longer than the one supplied; that owner recalled the code as E-10 from memory. Owners

Three more reports are left out of the counts. One owner gets white smoke and E10 when rain has blown water into the exhaust, and one has had E10 with flooding from a clogged glow plug screen; neither describes a fix. Owners A third, a gummed screen after a week of running, was seen only as a search excerpt.

What should I check first?

Work from the tank towards the heater, then power, then air.

1. Fuel in the tank, pickup in the fuel. One owner’s heater showed E-10 in the night because the pickup line was no longer submerged. Owners Dieselheat adds that the tank must not be more than 2 m (6.6 ft) below the pump. Manual
2. Watch the line while the pump ticks. Fuel should move towards the heater. In one confirmed case the air bubble in the line only shuffled back and forth, and a new pump cured it. Owners If the line is simply empty after an install or a dry tank, go to step 4.
3. Measure what the pump delivers. Dieselheat’s test: disconnect the fuel line at the heater, switch on, and catch the output. Each tick should deliver about a quarter of a teaspoon of diesel. Manual Ticking with nothing coming out means a blockage or a dead pump. On an unmarked replacement pump, check the direction: inlet from the tank, outlet to the heater. Owners
4. Fill an empty line. Use the controller’s priming routine, described in manual fuel priming, and stop as soon as fuel reaches the heater. Over-priming floods the burner. The Vevor M-button panel’s routine is a fixed 300 s countdown that ends by itself or when you press power. Manual Dieselheat’s alternative is repeated start cycles, up to 6 on a new or run-dry heater. Manual
5. Power. Dieselheat says to connect directly to the battery with the supplied loom, and if it has to be extended, to use 6 mm² wire with soldered joins. Manual The OnTrack guide says the battery should not drop below 12 V during start-up. Manual One owner in extreme cold got E10 from low voltage at start and simply retried until it lit. Owners
6. Air. Check the combustion air intake for a clogged filter and the exhaust for water or a blockage. If the exhaust has been extended, go back to the supplied length. Each of these was reported with E-10 by one owner. Owners
7. Glow plug screen. For a failed start with lots of white smoke, the Vevor CY manual says to check the screen next to the glow plug, and the OnTrack guide lists cleaning or replacing that screen under E-10. Manual See cleaning the glow plug and its screen and white smoke and no start.

Could the pump setting be the cause?

One owner reports E-10 kept appearing until the fuel pump setting was raised in the advanced menu. Owners That is a single report, and it only applies to controllers with a tuning menu. The Vevor XMZ manual describes none.

Details are on the hidden settings menu.

How do I clear E-10 after the fix?

Dieselheat’s guide resets its heaters by removing and refitting the fuse near the battery. Manual The B2010, Hcalory M98 and Vevor XMZ manuals print no reset step. If you do disconnect power, wait until the heater has finished its cool-down: the Vevor XMZ manual says it needs 3 to 5 minutes to stop completely. Manual See how to reset a locked-out heater, and do not keep resetting without a fix: each failed attempt leaves unburnt fuel in the burner.

When is it time to stop?

If fuel reaches the heater at the right rate, the supply holds up, the air paths are clear and the screen is clean, the cause is inside the burner. One owner with E-10 and smoke after long use found the burn chamber destroyed inside, and a new chamber fixed it. Owners A fuel dosing pump that ticks without pumping is a replacement part, not a repair.

If you are not sure, ask a technician. Opening the combustion chamber goes beyond routine owner maintenance. A mistake here can cause a fuel or exhaust leak. Stop if anything is unclear.