Well spotted and said snipquote, our 1996 laguna had the heater control speed problem , it was exactly as is said, the problem is the thermal fuse, they now cost £1.85 from the domestic electrical repair man so they have gone up a tad since 2008, if you cannot read the number the colour will tell you the temp cut out, in the lagunas case it is blue which will melt if the temp goes above 110 degrees, the unit tucks into the fan itself so the passing air will keep it cool in theory, you can buy higher cut out fuses for example red will cut out at 150 degrees, a scrapyard will probally sell you the whole resistor box for £20.00 chances are the thermal fuse has blown on that!

bultaco