So just bought a 2011 Apache 634 and getting to know it's foibles. Went away for the weekend with no EHU so needed to rely on the fridge on gas. Worked fine during the night but couldn't keep cool during the day. I've had this trouble with a previous much older fridge so is it simply a case that when on gas they can't keep cool when the weather is warm? Was only around 20 degrees (the weather) so not extreme and the fridge was facing West. Not sure when it was last serviced but hoping that this is all that's required or am I being too optimistic and just need to accept that on gas they are not up to coping with warm weather? Works amazing on EHU although also seemed poor when driving to site as arrived with the fridge temperature having increased.