95 Astro heater hose routing

It could be the heat control valve (either black plastic, or brass) close to the fire wall with heater hoses running into, and out of it. Otherwise...the heater core.

you can connect the hose from the water pump and hose that goes into intake manifold behind the alternator with a copper 1/2 inch or 5/8 90 degree fitting. maybe $2.00. and two 3/4 hose clamps. maybe another $2.00...

Look at the fire wall you will see two hoses going through the wall they are 3/4 inch they will be your heater hoses one routes out the back of the intake manifold I believe the other is by the ECM valve.
Are you missing your heater hoses if so it may be that you have a bad heater core have you owned this car for long. If you are needing to reinstall all your hoses look on You Tube you will probably find a video telling you how to do it.

no heat is cause by many things (coolant not at 180F and holding?)
no blower?
damper closed.
as you said the water valve.
location:
see heater, see the core, see the 2 brass tubes passing thru the fire wall. ? they go to hoses. and if car has a valve its there.
some cars dont use a valve at all.
ill look yours up. USA spec car. bingo on valve.
so here is 91, camry. im looking now, its just like i said above
at the fire wall hose; to heater core.
what i do is here.
1: engine hot?
2: are both above hoses hot, (no fail, yes, good.)
here is a list of every heater failure possible.

http://www.fixkick.com/AirCond/heater.html


it's only 2 rules.
air must flow
the hot water must flow.
or it fails.


you can look at any time at alldata.com
or buy the FSM. for best play, (i promise)

One line supplies vacuum from the intake manifold to the control panel. The other line runs back from the control panel to the heater water control valve, which is along the heater hose. The vacuum port on the valve is at the top of the cylindrical actuator.

Below is a vacuum hose diagram for you. I hope this helps.....

Bleed radiator and check valve that allows antifreeze
to flow through the heater core. Follow the in-out
heater hoses toward fire wall to locate valve and
operate temperature control to see if it moves.

You'll need to remove the interior engine cover(dog house).Torx screws for the covers, 2 bolts on floor. and bolts against the fire wall (i use a long extension with a swivel socket at the end). The IAC valve is screwed in to the side of the throttle housing (where the gas pedal hooks up to the engine).I can get a pic if you need it.

SOUNDS AS THOUGH THE HEATER CORE IS PLUGGED. TRY BACK FLUSHING IT AGAIN. IF YOU STILL GET NO FLOW IT IS MORE THAN LIKELY PLUGGED AND WILL NEED TO BE REPLACED. THE TUBES ARE VERY SMALL AND PLUG EASILY WITH RUST.

2 things to check

one take the hoses back off the fire wall take a hose and flush out the core both directions
till the water flows freely and clean this will eliminate the possibility of the core being stopped up

then you need to check the Heater ac blend door to see if it is moving when you slide the control from cool to hot the cable may be off or the door arm broken

hope this helps David