Should i have heat ?

[donZ]

my car has a 160 t-stat, the fans come on a 170.
should i be getting any heat, or is something wrong,
it blows out cold. maybe just a tiny bit warm.

 

[1970gsx]

Yes, you should be getting heat. It won't be piping hot like with a 180-195 thermostat, but it shouldn't be luke warm either. Make sure your heater control valve is opening and closing properly. Don't assume just because the arm moves up and down it's working either. When I replaced mine for it leaking, I notice the arm went up and down, but the valve itself was siezed in the open position, yours may be stuck closed.

 

[FlyinGN]

or maybe that plastic piece that connects the heat/cold lever to the duct door controller? They break and this is what happens. Kirban now reproduces em .. So they must be a hot item

 

[scottyb]

My control valve is tired and needs a little help to open if I don't use the heat for about 2 weeks or so. With the heat on, give it a nudge to see if it moves.

 

[blackbuick87]

With a 160 mine puts out enough heat to sweat me out of the car still. Heater core may be plugged

 

[donZ]

where is the control valve located

 

[scottyb]

Against the firewall above the passenger side valve cover. It has a vac line to control it.

 

[donZ]

there is no vacuum going to it, the hose is there.

if i take another vacuum hose, and put it there, the valve arm will move, but still no heat.

i read in another post, that some guys where going under the dash by the glove box, and moving something.

what do you guys think.

 

[scottyb]

Before you start to dig under the dash, make sure the vacuum source is good going into the car. Does the AC/defrost/floor vent control work? If the air gets routed correctly when you move the control (from vents to windshield to floor), then you have vacuum and may need to check the control head/vac line that goes back out the the valve. If not, check the source, it has a check valve (little black and white gizmo that sits inline in the vac line) that is 'above' the driver side valve cover near the EGR and fuel pressure regulator. I think the same line t's out to the EGR solenoid. Check for vacuum there and follow that line accordingly.

So you have 2 problems? If you supply vac, the arm moves, but still no heat? Was the engine hot? When the arm opens, feel the lines going into the heater core and see if they get warm.

Now that I think more, maybe the control head is bad (or parts leading to, never actually worked on one). No vac to heater valve and also to flapper to direct air over the core.
I'm getting confused now.

 

[FlyinGN]

thats what I was talkin about in my post!!!
Its the heater control lever and if the plastic link breaks moving the heat control lever does nothing. Thats what the people are moving behind the glovebox. You can get to it easy and it quick to see if its broken.