mustaphapint
Free Member
Ever since we bought our Hymer B644 I've thought it was running cool. The temperature gauge in the dash never goes above a reading of 60 and the in cab heating has never seemed particularly warm, even on quite long runs. I had it in mind that the thermostat may not be working properly.
That all changed this evening on our way back from Cornwall. I was driving a bit more spiritedly than I have done before and there was a lot of uphill work. The temperature gauge still didn't go over 60 but we noticed that the cab heating was working a lot better, in fact it was getting a bit too warm. Then the high temperature warning light came on. By this time we were just coming up to some services on the M5 so I pulled in. The radiator header tank was still full and the radiator hoses were hot but the top of the radiator was cold to touch and the fans were not running. We left it to cool down for a while then set off again. I kept the speed below 50 and we covered another 70 miles or so without problem and then the warning light came on again after I let the speed creep up a bit. I slowed down and it went off straight away and stayed off for the remaining 50 miles home.
Where is the sensor for the temperature gauge?
I haven't had a proper look yet as it was dark when all this started but we're quite pleased to get home without any further problems.
I'm thinking the radiator may perhaps be blocked and I'm hoping it can be flushed out.
That all changed this evening on our way back from Cornwall. I was driving a bit more spiritedly than I have done before and there was a lot of uphill work. The temperature gauge still didn't go over 60 but we noticed that the cab heating was working a lot better, in fact it was getting a bit too warm. Then the high temperature warning light came on. By this time we were just coming up to some services on the M5 so I pulled in. The radiator header tank was still full and the radiator hoses were hot but the top of the radiator was cold to touch and the fans were not running. We left it to cool down for a while then set off again. I kept the speed below 50 and we covered another 70 miles or so without problem and then the warning light came on again after I let the speed creep up a bit. I slowed down and it went off straight away and stayed off for the remaining 50 miles home.
Where is the sensor for the temperature gauge?
I haven't had a proper look yet as it was dark when all this started but we're quite pleased to get home without any further problems.
I'm thinking the radiator may perhaps be blocked and I'm hoping it can be flushed out.