Q Why is our LPG gauge always showing full?
In response to your article in April MMM (p12), we have a problem with our LPG underslung tank gauge and were wondering if it is a common issue.
We bought our new campervan in May 2022 and, from the start, the LPG gauge showed full. After two months of gas use, the gauge had not moved.
We were assured that the problem would resolve itself after emptying and refilling the tank a few times. Now, nearly two years later, and having completely run out of gas on two occasions, the gauge is still showing full – it has simply never budged.
While we’ve got used to working out when we need to refill, one consequence we can’t circumvent is that when we want to travel to France, LeShuttle (Eurotunnel) requires proof that the tank is no more than 80% full to be allowed to travel. With the gauge showing full all the time we are not able to do this so last year we had to use the ferry on six occasions – and that certainly wasn’t our preferred option – especially on the autumn trip.
We never actually attempted to use LeShuttle due to this issue, so it would be helpful to know if the rule is enforced and if it relies solely on the gauge for evidence. Any advice or answers in a future article on the subject would be much appreciated.
Ian and Sonia Taylor
A Let’s deal with the simple things first. For many years, all LPG tanks have an automatic shut-off system built into the filling system such that, at 80% of the tank’s capacity, no more gas can be put into it. At this point any of the LPG tank fuel gauges will indicate 100%.
The operators of Eurotunnel (now called LeShuttle) and the ferries are well aware of this, so it is not something it will expect a user to be able to demonstrate. What it may ask is to see that the main gas shut-off valve has been turned off for the crossing.
LeShuttle’s website says, “We are aware LPG tanks are essential for cooking, refrigeration, heating, etc, but request the appliance is switched off before boarding and during the entire crossing. Tanks up to 47kg may be carried, but must be less than 80% full.”
You report that your gauge always shows 100% full, but do not say if this is a remote gauge inside the habitation area or that physically built into the tank itself. If it is a remote gauge, then the most likely scenario is a broken wire between the display unit and the tank sender unit. If it is the actual gauge on the tank then it is an internal mechanical fault.
Either way you need to go back to the qualified installer of the bulk tank and get them to resolve the problem. This is best done when the tank is empty.
Clive Mott
Many thanks for your prompt response regarding our faulty remote (in-van) gauge for the LPG underslung tank. We knew that it was a 25-litre tank, which only took 20 litres, but it had failed to sink in that this automatically meant it was compliant with Eurotunnel’s rules despite the gauge reading full.
We took your advice and immediately contacted Autogas 2000 Leisure (near Thirsk), which had installed the tank. It booked us in for the following week.
It put the ’van up on the ramps and fixed the problem FOC in just over 10 minutes while we ate our sandwiches in the warm reception area. Here, it has a display of all its products, including a cut-open underslung tank so you can see the inner workings, demonstrating how the gauge and automatic 80% fill cut-off work.
We much appreciate your sound advice and only wish we’d sought it sooner!
Ian and Sonia Taylor