1980 Jeep CJ5 How to repair the heater?

Tiny
LAYLATEXAS
  • MEMBER
  • 1980 JEEP CJ5
  • 4 CYL
  • 4WD
  • MANUAL
  • 68,000 MILES
On my jeep the blower fan (I believe that is the part that makes the unit come on) is not coming on. How can I identify what that looks like in my engine so I can see if all the wires are intact and/or plugged in. I had someone replace the thermostat and I was wondering if they did not reconnect the thermostat to the heater or something. I do not know anything about engines so baby steps please.
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Monday, July 26th, 2010 AT 7:15 AM

3 Replies

Tiny
CJ MEDEVAC
  • EXPERT
See my profile (explore)....Read the 1st----3 or 4 CJ 5 Forum AND CJ 7 Forum questions and MY ANSWERS (more if you like) and squeeze in "1985 CJ 7 Stalls When Hot" (14 responses--a little further down the list in the 7's)......this should sorta let you see how I answer and the extent I will go to help you with your Jeep (even though you do not respond, as most do not).

I will also send you a private message (PM) at the end of this....I have done many modifications to my Jeep(s) that improve them and make them EZer to maintain.....ONE OF WHICH IS EZer ACCESS TO THE HEATER and COMPONENTS.....I have about 15 Jeep Modification albums all are different....I have decent pics and good explanations (captions) at the bottom of the pics.....Many pics in each album.

You should really have a Chilton or Haynes Repair Manual....It would be helpful for me to be able to explain things better...About $30 at auto parts store...use it forever...anywhere.

Ok, Mr. Thermostat is in your engine (the antifreeze part)..i..What he does is let your engine get to a specified temp. (say 180 degrees) And opens and closes to let water run thru the radiator to keep it at this constant temp. (if broke, engine temp will get too hot [engine gets hotter and hotter on its own])....OR.....broke, never get hot enough.

In order for your engine to perform well, it must run at a hot temp......Cool thing about this is: You can steal some of this hot water, run it thru a heater core (small radiator looking device in your heater box) and blow a fan over it and you have INTERIOR HEAT!!!

I take it your heater hoses get hot ('cause radiator does)----BUT----Your heater just will not BLOW HOT AIR VIA FAN? AM I TRACKING RIGHT?

We have a fan (squirrel cage type) on passenger side (under the battery tray) the Tail of the motor protrudes thru the fire wall.....the electrical connection does too....How convenient!......the bad thing is you must remove the ENTIRE HEATER to replace/ clean/ repair motor or plastic fan (in the cockpit...remove whole dash.........PAIN IN THE DONKEY!!!!....(The fan is on the back of the heater box)

Of course it could be a fuse or loose wire or even a switch on the dash.....check that EZ stuff 1st, I have discussed thus far---then give me results....We will then go into testing procedures (get you a Voltmeter at Auto Parts store, $6-$15, to continue)

I have made heater access EZ (all components) on mine.....This is a "SNEAK PREVIEW" of one of my modification albums......

While Installing a newer, better heater system (from '77 to '82) I decided to spend some EXTRA time making heater core and fan EZ to access without taking the whole dash apart (by measuring precisely and cutting out firewall to be able to remove heater components from the firewall side!)....This is what I did for the fan assembly portion....You must see the albums to understand the whole deal!

See the little hole about at 2 O'clock on the "Nelsomatic Fan Access Cover?" (this is for the battery tray bolt----there is another one at 4 O'clock, behind the fan motor, for a wire connection, cannot see in pic) and the yellow dangling wire?...that is power to the fan when the fan switch is on and Jeep key is on, it connects to the "hidden connector" (NOTE: my battery tray is removed in this pic)

The hoses at bottom left,in pic, are going thru the firewall, hugging the passenger fender and body all the way. They are the water source for my "Homemade","remote","extra" Heater for the cockpit, I named it, "The Nelsomatic Sahara Breeze", it too, is shown in my Walmart album sharing---ASK, and I will send you a "PM" (private message) you can respond to my "PM" with your E-mail address (not available to entire forum, just me!) I will send you my albums of modifications, which may be helpful to you and your Jeep!


http://www.2carpros.com/forum/automotive_pictures/411289_MIGHT_AS_WELL_UPGRADE_THIS_WHILE_I_AM_HERE_1.jpg



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The Medic
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Monday, July 26th, 2010 AT 8:41 AM
Tiny
LAYLATEXAS
  • MEMBER
But I also have a 1997 Wranger and the a/c only blows out the defroster. The mechanic said it would cost me 500.00 to replace the "default" switch. 180.00 for the switch and the rest in labor. Since I don't have the extra 500.00 laying around, do you know if I can remove the face cover and just make the a/c come out of the face vents only instead of the defroster? Or some other way to make the a/c come to the face vents only? Thanks. And remember girl doing auto repairs, baby steps!
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Monday, July 26th, 2010 AT 8:58 AM
Tiny
CJ MEDEVAC
  • EXPERT
Remember my Profile? Mostly CJ Guy. May can still help. Or somebody else may step in.

Your Wrangler system has doors in it (much like most cars these days) vacuum and vac. Lines operates the doors (manually operated cables do it on CJs)

This crap is usually EZ stuff to replace or repair---If you can send a "Smurf" in for the Job. Hard to get to in most cases.

Do you have a manual for Wrangler.I have many CJ manuals. No havey Wrangler yet. No needy manual for me yet. Want A/C terribly.

I do have Chilton with last of CJs, beginning of Wranglers (1987) Same heater for 10 years? Doubt it, a perfect heater set-up has probably been tinkered with by those pesky auto engineers!

Respond about Wrangler and CJ (yea, CJ) Then give me a little research time.

The Medic
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Monday, July 26th, 2010 AT 9:20 AM

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