thanks chris,   the temp. censer was replaced with new, (on tractors left side under seat,)  when useing tractor for long time, exspecaly when on hotter days there is a lot of heat radiating up from under the operators platform, more when the hydros. are used lot ( pto the worst  ) far as temp. light, a light comes on when hot, when tractor is idled whey down like around 850 rpms  bring it up light does out    if i'm not mistaken there are three red warning lights on left side of dash,  parking brake, oil pressure, hydro pressure,