No Heat Or A/C On A 70 Roadrunner

soundhd · Jan 3, 2018

I have a 70 Roadrunner with factory A/C. Have no heat or A/C. Been looking over the A/C section in the shop manual and have pretty much figured out how it all works (pretty involved...LOL) Anyway looks like I have to remove all the heating/A/C components from under the dash to be able to check everything and replace anything that needs to be replaced to get at least the heat to work "normally" (still have to get the compressor working and install some missing A/C lines & hoses). Just wondering how difficult that will be with out pulling the whole dash out (and I know to do that the windshield has to be removed).

Thanks

garrett1308 · Jan 3, 2018

Depends what needs replaced, you should be able to do most everything with it under the dash

texas69bee · Jan 3, 2018

soundhd said:
I have a 70 Roadrunner with factory A/C. Have no heat or A/C. Been looking over the A/C section in the shop manual and have pretty much figured out how it all works (pretty involved...LOL) Anyway looks like I have to remove all the heating/A/C components from under the dash to be able to check everything and replace anything that needs to be replaced to get at least the heat to work "normally" (still have to get the compressor working and install some missing A/C lines & hoses). Just wondering how difficult that will be with out pulling the whole dash out (and I know to do that the windshield has to be removed).

Thanks

I’m not sure about a 70 box with A/C but I was able to roll the entire heater box out with the dash still in on a 69. It was tight but it came out.
I also agree with garrett1308

65-440 · Jan 3, 2018

Yes, the heater box will come out with the dash still in the car ...

meskip · Jan 4, 2018

It will come put from under the dash but be advised it is big & heavy. Of course all the lines on the firewall side will have to be disconnected. Be careful with the vacuum lines.

eldubb440 · Jan 4, 2018

is the blower motor working?

JimKueneman · Jan 15, 2018

soundhd said:
I have a 70 Roadrunner with factory A/C. Have no heat or A/C. Been looking over the A/C section in the shop manual and have pretty much figured out how it all works (pretty involved...LOL) Anyway looks like I have to remove all the heating/A/C components from under the dash to be able to check everything and replace anything that needs to be replaced to get at least the heat to work "normally" (still have to get the compressor working and install some missing A/C lines & hoses). Just wondering how difficult that will be with out pulling the whole dash out (and I know to do that the windshield has to be removed).

Thanks

What are you wanting to check? Much of it you can check fairly easily without removing much.....

If you are comfortable taking the glass out the dash comes out quite easily. The hardest part is getting the bulkhead connector back into the firewall on reassembly. There is not much room in there.....

oldbee · Jan 15, 2018

Assume thermostat is in and working? Are the htr hoses getting hot? First things first.

BeeKool · Jan 15, 2018

meskip said:
It will come put from under the dash but be advised it is big & heavy. Of course all the lines on the firewall side will have to be disconnected. Be careful with the vacuum lines.

X2
There Are also several bolts that protrude through the firewall.
My car has no motor and the dash is out and it was still a pia.

JimKueneman · Jan 15, 2018

BeeKool said:
X2
There Are also several bolts that protrude through the firewall.
My car has no motor and the dash is out and it was still a pia.

More than several! I struggled getting it lined back up and the half dozen studs back through the firewall with no engine, dash, windshield, doors, console, seats, or carpet in it by myself.

oldbee · Jan 15, 2018

JimKueneman said:
More than several! I struggled getting it lined back up and the half dozen studs back through the firewall with no engine, dash, windshield, doors, console, seats, or carpet in it by myself.

You guys have to realize though that JimK is getting old& he’s an engineer to boot,lol.

JimKueneman · Jan 15, 2018

oldbee said:
You guys have to realize though that JimK is getting old& he’s an engineer to boot,lol.

You're number 1, twice oldbee.......

No Heat Or A/C On A 70 Roadrunner

soundhd

Well-Known Member

garrett1308

Well-Known Member

texas69bee

Well-Known Member

65-440

Well-Known Member

meskip

Active Member

eldubb440

more miracles than Jesus

JimKueneman

Well-Known Member

oldbee

Well-Known Member

BeeKool

Well-Known Member

JimKueneman

Well-Known Member

oldbee

Well-Known Member

JimKueneman

Well-Known Member

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