Ranger 3.0 Runs Hot With A/C engagged Only..?

[snahman]

Hello. I have a current thread going about my temp gauge so I started another not to complicated that one. Hope this is ok....Anyway, my '91Ranger 3.0 will do ok driving around and even will idle, but if I engage A/C and drive a while ,it runs hot. I mean HOT!!! Boiling back thru expansion tub. I'll let it cool down, refill and as long as I don't engage the A/C ,it'll do fine.Will unconnected vacuum hoses cause this problem as I have rotted out lines that's not connected but the truck seems to run ok without them being hooked up. What am I missing not having them hooked up? Also, where can I get "drop in" type hoses to replace the broken ones? Thanks..!

 

[monstermazda]

How's your clutch fan?

Ac systems is in front of the radiator so if the ac system is make heat the goes into the radiator and the out.

I only think the heater control valve vacuum line would because when your ac systems I'd on heat is to.

Sent from my SAMSUNG-SM-G870A using Tapatalk