How to get my van to blow hot air

[dssdj2007]

Hey guys i got a 91 chevy g20, i like my van, but the frickin heater wont blow hot air and its cold outside, it will only blow barley warm air out the vents. Is there something i should know on how to have a van blow hot air??

[Vanfan]

Check thermostat, coolant level, maybe even have the system flushed...

[dssdj2007]

i just had a new radiator put in so i dont need a flush, haha some people told me to put cardboard infront of my radiator but that looks tacky i was hoping that it is a easy fix, do you know of any place where i can download a pdf manual for a 91 chevy g20

[Vanfan]

With a new radiator you know its clean, but doesnt mean the heater core aint plugged. Make sure your coolant level is full first, then go from there. Next I would lean towards thermostat.

[dssdj2007]

alright in that case can you help me out on where i can find the thermostat on a 91 chevy g20 or where i can download a manual

[Vanfan]

Follow the big antifreeze line on the top left of the radiator to a thermostat housing. It will be in the front if the engine and have a bowl or dome shape to it held down by two bolts. Not sure on the manual,, If you trust Chiltons or Hayes books there accessible at any parts store. Cardboard is tacky, but if your somewhere it gets really cold like here in Alaska where Im at, It works great!!!

[dssdj2007]

cool thanks ill check it out

[Vanfan]

Your welcome, keep me informed on how it goes!!

[oldblu65]

Sounds like your heater core may be partially clogged . You only get warm air because the flow through the heater core isn't sufficient to totally heat the air . I had the same problem for years in my old truck . Replacing the heater core solved the problem .

[Scortcher]

Try back flushing the heater core. That worked for me a couple times.