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**1971Stepside** · 09-01-2022, 09:14 AM

My VA is doing this same thing. It blows cold until the engine heats up and then hot water makes its way to the heater core. VA told me that I may have the valve in backwards, but I checked and it isn't. I have the old style VA evap unit where it is still cable driven. Following this thread to see what others have done. Ironically, it is has just been too hot to get out and mess with it.

09-01-2022, 09:14 AM	#20
1971Stepside Almost Satisfied Join Date: Mar 2002 Location: Springfield, MO Posts: 2,928	Re: Shut off valve for heater hose My VA is doing this same thing. It blows cold until the engine heats up and then hot water makes its way to the heater core. VA told me that I may have the valve in backwards, but I checked and it isn't. I have the old style VA evap unit where it is still cable driven. Following this thread to see what others have done. Ironically, it is has just been too hot to get out and mess with it. __________________ 1971 C10 Stepside. LSx 6.0 with BTR Stage IV, Speed Engineering Headers, 4L80e transmission w/3200 Circle-D Stall. 3.73. Posi. Purchased this truck when I was 17. I started the rebuild (or take apart) in 1993. I have drug it around all over the country in pieces. Finally back on the road in 2021. "I can't complain, but sometimes I still do. Life's been good to me so far."