I am having a problem with my car's climate control:
If the heat is turned off while the car is running it can not be turned back on. To turn the heat back on I must shut down the engine and then restart (turn the key off and back on)
Any help in isolating the problem would be of great help
Thanks

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JSR

1983 300D Turbo
1995 E320 Wagon
2001 MR2 Spyder
2001 Subura WRX Sedan