Having problems with your 1995 Chevrolet Blazer ?
Heater only works on defrost - 1995 Chevrolet Blazer
If it is a vacumn controlled system there will be a vacumn leak somewhere in the supply to the controls for the mode selector..the defrost position is a default setting in case of loss of vacumn. so it can still be driven in winter ...Check all vacumn connections and inspect hoses for damage ..Good luck and hope this was helpfull
Repair Help & Product Troubleshooting for 1995 Chevrolet Blazer
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