... 5 speed is nice... I'm not sure which of mine I like better... 5speed 240 or 4 speed 300... I'll decide later

I certainly think the thermostat to be the likeliest candidate. sounds stuck closed to me.
get a new one in there!

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!