I Have A 1986 Oldsmobile Cutlass Ciera And The Heat Has Gone Out. When I First Start The Car There Is Heat. Once I Start Driving There Is Only A Trace Of Heat.

The Temp Light Came On Two Weeks Prior, But Has Not Come On Since.

Thanks

Looks like you might need some coolant

tstat? if coolant starts dumping inside heater core too. Make sure your coolants full too.