What should I do next for my heat to work? heres a diagram and what ive done...

[knoslf]

Sorry if this is the wrong area but here it goes, i have NO heat! I got this numbered diagram from the dealership and have already replaced # 13, and 19. The problem i noticed is that theres no vacuum(suction) from #14 line and from what ive read that line is supposed to crerate a vacuum which opens the control valve allowing hot water into the core for heat, but my heater core is getting hot but still no heat. Once I disconnected & pinched off the #14 line and got very hot heat just for that moment and soon as I re-connected it the heat stopped & thats when I changed the heater control valve(#13) but no results, and no vacuum at all in the line either, so I changed actuator(#19) and still no heat. So im thinking i need to replace whatever makes the line that runs between #13 and #19, not sure what #20 is for but im thinking that since it goes to #21( dont know what its called) I mind as well replace that today so off to the junkyard for now. Does anyone know what else I can look into? The bm works on all speeds and the heater core/hoses are getting hot as well. Ive already replaced the WP, RAD, T-STAT and gaskets(head/intake)...btw, what is #21 called and what does line #20 do?

 

[knoslf]

No advice?....anybody?....lol where ya at sunlitecomet? someone chime in it gets cold here in Bronco City lol

 

[retorq]

Get rid of #13 altogether for now so you have heat, fix the heat issue in the summer.

You'll need a hose adapter to got from the 3/4 to 1/2 or what ever the sizes are. I did the same thing to mine, I bypass the core completely in the summer if it gets to hot.

 

[SunlitComet]

does gray/black wire on 19 get volts when you turn temp dial from max cold to any other setting or vice versa.

 

[knoslf]

Get rid of #13 altogether for now so you have heat, fix the heat issue in the summer.

You'll need a hose adapter to got from the 3/4 to 1/2 or what ever the sizes are. I did the same thing to mine, I bypass the core completely in the summer if it gets to hot.

never thought of that, will that enable heat all the time?

 

[SunlitComet]

and forget #21 does not really have a name disconnect 20 from solenoid valve on firewall end and make sure you have vacuum.

 

[knoslf]

Hmmm, ill have to check those wirw sunlite but all i have ais a lousy tester with a screwdriver handle that lights up...gotta fine it, is there another way to check it?

---------- Post added at 06:53 PM ---------- Previous post was at 06:46 PM ----------

and forget #21 does not really have a name disconnect 20 from solenoid valve on firewall end and make sure you have vacuum.

No vacuum from the thing on the firewall at all..

 

[SunlitComet]

vacuum on line #20 while still attached to engine part #21.

 

[knoslf]

vacuum on line #20 while still attached to engine part #21.

Oh okay.....

 

[knoslf]

Just checked that and there is NO vacuum on line #20 from the part on the firewall(as seen in pic), but the engine part #21 has strong vacuuming..

 

[SunlitComet]

Line 20 when attached to 21 should have vacuum on the side of line that attaches to solenoid you pictured tho it may be hard to feel with ahose of small diameter. DDid you do the volt test?

 

[knoslf]

idk its dark now but ill check the line for suction while disconnected from #19 on the firewall, if the line is plugged you think that could be the issue? Couldnt fine my little tester but will 2morrow or buy another ont....

 

[SunlitComet]

Uh, yeah.

 

[knoslf]

Line 20 when attached to 21 should have vacuum on the side of line that attaches to solenoid you pictured tho it may be hard to feel with ahose of small diameter. DDid you do the volt test?

Just checked #20 on the solenoid end(while the other end is on #21) and there is strong suction on that end...cant find my tester...the solenoid is the second one, took one off another truck like mine for $2 and thought i'd try it but

 

[SunlitComet]

test that wire as soon as you can then.

 

[knoslf]

test that wire as soon as you can then.

Okay, checked the wire and there is power going to it, tested the one from the junkyard and it had power too...

 

[SunlitComet]

what position was the temp dial in with power to it and not. with ignition on and blower on any setting setting except off.

 

[knoslf]

The temp dial was all the way on 'hot' in the red....the blower motor was on high/ignition on too...idk what the issue might be now

 

[SunlitComet]

With that line 20 connected to engine an water valve solenoid did you get a vacuum onthe hose that goes from solenoid to water valve? And what volvoltage did you get when the temp dial was set to max cold detent and a/c control on?

 

[knoslf]

With that line 20 connected to engine an water valve solenoid did you get a vacuum onthe hose that goes from solenoid to water valve? And what volvoltage did you get when the temp dial was set to max cold detent and a/c control on?

No vacuum on the hose that goes from solenoid to water valve at all, dont recall the numbers from the test as a friend did it for me