wgc68nyc

Just like the title says my Old Air A/C/heater system blows but never warms the air. Besides checking fuses what else could be the culprit? The whole system is a year and a half old.

rmodel65

see if air s circulating thru the heater core or not

wgc68nyc

Forgive my ignorance but how do I do that? Put my head against the box under the glove box?

rmodel65

id disconnect the heater hoses on both sides and see if you can run water from a garden hose thru it

wgc68nyc

I just had the whole system flushed 2 months back so I dont think it is clogged. Engine temp last night didnt get above 165 so maybe the thermostat isnt opening all the way? I had the timing changed to keep it running a little cooler but now that the winter is here maybe I should set it back.

rmodel65

maybe the thermostat is stuck open it would over heat if it was closed and not opening

Xargon321

Check the heater core cutoff valve most of those kits have a valve that will shut the water flow to the heater core off when running the a/c check and see if that might have got stuck closed or unplugged.

kenash

Hi,
If the above ideas don't solve, go to a 180 T/S. The way I view this, that 165 is going to open sooner and will allow the coolant to circulate sooner thus not absorbing as much engine heat as a 180. A 165 is better in the summer as you need to get a jump on the heat potential.
Good Luck!

rmodel65

i live in south GA and I never run anything but a 180 stat

fastbackford351

Whenever you move your control lever from 'cool' to 'warm' do you hear the "Thuwhack" of the blend door moving under your passenger side dash?