Auto-Trail Grande Frontier Owner's Handbook (2026)
Official technical documentation and workshop diagnostics for Auto-Trail Grande Frontier Owner's Handbook (2026).
Master Troubleshooting & Diagnostics Matrix
| Error Code / Indicator | Symptom / Meaning | Step-by-Step DIY Fix | Suggested Actions |
|---|---|---|---|
N/A | Gas burner does not light within fifteen seconds (Hob/Grill/Oven) | Turn the control knob back to the O position and release it. Wait at least one minute and repeat the ignition steps. | DIY Safe |
N/A | Water pump runs on for more than 5-10 seconds after closing all taps Possible Cause: Possible leak in the system | Check the system immediately for leaks. Always switch off the pump at the control panel when leaving the vehicle. | DIY Safe |
N/A | Aerated water from a tap Possible Cause: Leak on the suction side of the pump | Inspect the suction side of the pump for leaks and rectify. | DIY Safe |
N/A | Flame lifting away from the gas burner Possible Cause: Gas pressure is too high | Recheck the regulator, cylinders and pipes and adjust as necessary. | DIY Safe |
N/A | Yellow flame producing soot on gas appliance Possible Cause: Gas pressure is too low | Recheck the regulator, cylinders and pipes and adjust as necessary. | DIY Safe |
Operational Fault | Red LED below fuses (fuses 2-10) on the PSU is illuminated Possible Cause: Blown fuse | Investigate the fault and replace with a fuse of the correct rating/value. Do not keep replacing the fuse if it blows repeatedly; contact your dealer. | DIY Check / Tech Fallback |
N/A | Smoke alarm emits a short beep once a minute Possible Cause: Battery is at the end of its life | Replace the battery immediately. Recommended PartAffiliate link Duracell Plus 9V Alkaline Battery (2 Pack) 6LR61~£6.50 for 2Amazon's Choice, 4.7★ (15,000+ ratings) View →Most caravan smoke alarms take a standard 9V battery like this one - worth a quick check against your own alarm before ordering, since a few models differ. | DIY Safe |
N/A | LED indicator on smoke alarm does not flash every minute Possible Cause: Battery is completely flat | Replace the battery immediately. Recommended PartAffiliate link Duracell Plus 9V Alkaline Battery (2 Pack) 6LR61~£6.50 for 2Amazon's Choice, 4.7★ (15,000+ ratings) View →Most caravan smoke alarms take a standard 9V battery like this one - worth a quick check against your own alarm before ordering, since a few models differ. | DIY Safe |
N/A | Carbon monoxide detector emits a single audible chirp once per minute for up to 30 days Possible Cause: Settings of sensor/circuitry found to be incorrect or batteries have become low | Replace the batteries (and ensure unit is within its 10-year lifetime). | DIY Safe |
Frequently Asked Questions
Q: How do I tune the Avtex television when switched on for the first time?
Press the direction arrows to select your on-screen display (OSD) language, then select 'Auto Search' and press the 'OK' button.
Q: How do I enable Silent Mode on the PX310 battery charger?
Press and hold the charger button for 3 seconds. Output will be limited to 5A, and silent mode will exit automatically if the charger is switched off and on, or after 12 hours.
Q: Which fuse or MCB protects which circuit, and what rating should I use to replace one?
Fuses on the PSU (fuses 2-10 have a red LED underneath that lights when blown; the charger fuse has a green LED indicating the charger is working): Fuse 1 (25A, white) - Charger; Fuse 2 (7.5A, brown) - Permanent 12V; Fuse 3 (10A, red) - 12V Sockets; Fuse 4 (10A, red) - Appliances/Fans; Fuse 5 (15A, blue) - Compressor Fridge (when fitted); Fuse 6 (10A, red) - Pumps; Fuse 7 (10A, red) - Light Main & Dimmer 1; Fuse 8 (10A, red) - Light Main & Dimmer 2; Fuse 9 (5A, tan) - Awning/Entry Light; Fuse 10 (10A, red) - En Route/Electric Step; Fuses 11-13 (15A/7.5A/5A) - Spare; Fuse 14 (15A, blue) - Solar (rear fitting). MCBs: MCB 1 (10A) - 230V sockets/cooker; MCB 2 (16A) - Extra 230V sockets/heating system; MCB 3 (10A) - Fridge/Separate Water Heater/Charger/Aircon. Always replace a fuse with one of the same rating - never a higher value, which could damage the wiring harness. If a replacement fuse keeps blowing, do not keep replacing it - investigate the underlying fault and contact your dealer.