Are you being serious? 90 is almost boiling! One word replies are rarely serious so I thought I should check. Do you know what might be causing the gauge to missread? It was a gauge from Conrad-uk.com. I can't link to it because the website is session based but it is on there. Edit: Oh, the link appears to work:
http://www.conrad-uk.com/ce/en/product/8...e-60-160C- 12V/SHOP_AREA_17287&promotionareaSearchDetail=005
http://www.conrad-uk.com/ce/en/product/8...e-60-160C- 12V/SHOP_AREA_17287&promotionareaSearchDetail=005