93 Heater controls. Help

:banghead: Thanks to all of you. I have now found out its a stock fault>> So I have amassed the components to at least operate the heater!! Will run it for a month or so>>> it might not look Saab but it works (at least the last 1000 miles)?? But Saab should have offered a replacement. Enjoying my travels in My 93>> just got to keep AC on for windscreen until I get back to the workshop. Has anyone else solved this problem????

Jwa