JP's 93 fd

iTrader: (28)

My heater does not freakin work ever since i bought it and want to do something about it now. it does not turn on or anything(not even blow ). can anyone tell what to do or look for. should i replace the relay? thanks

White94RX

like the blower doesn't work? Most likely the blower resistor (controls the speed of blower) or the blower motor itself. Start with the basics like checking fuses.

JP's 93 fd

iTrader: (28)

fuses are not burnt out. where's the blower resistor located?

White94RX

not sure. I'm sure you could find it in the factory service manual. I think they're attached to a sticky in the 3rd gen forums.

DaleClark

iTrader: (55)

Here's my writeup on the AC blower resistor -

http://www.clubrx.org/default.asp?id...ntent=59&mnu=5

First, let's go over a few things. If you switch the AC to speed 4, do you get air blowing out of the vents? If so, that's definitely a resistor problem. If not, you have a problem with the blower motor itself or the fan switch in the dash.

Dale

JP's 93 fd

iTrader: (28)

no air is blowing at any speed. is there any way to check if the motor is the cause? thanks

badddrx7

iTrader: (7)

Start with page G14 ( heater/ac section ) of the green manual and go from there. The shop manual is your friend and the source of all direction you will need to find root cause. This way you systematically go thru each possible cause.

OR you could blindly just start tearing things apart on your own, possibly causing more damage and running up the $$$.

My $0.02 for today

psquare8

There is a Tech Service Bulletin 95-09 - insufficient contact at the switch connector - switch runs through the same harness as the hazzard switch - they can work and problem may still be present - all 93-95 fd's -may be worth checking.

Piesareus

Hi new to the group and looking through post found I had the same problem you had recently.
I was not getting any responce form any of the heater controls including the AC not working, fans 1-4 not working, no little orange lights on the fan switch or on the posistion switch for air direction, the only thign that would work was the Hazard light switch.
I was only able to fix the problem by removing the heater controls and re soldering the circuits attached to the controls.
I did hunt down the specific area and I will dig out the info from Mazdarotaryclub for you, worth a try it worked for me, after soldering I now have fully functioning controls again.

I will post some more info once the MRC site is back cup and running.

psquare8

Did you remove the connector block and solder all the wires? That would solve the problem. TSB is s bit less extreme.

Piesareus

I stumbled accross my problem area on the board which as you can see here is shot, once I had resoldered the connections into this I went over the rest of the PCB to make sure, pluged it in and it worked.

psquare8 which connector block do you mean? knowing me I went the long way around to solve something as usual

JP's 93 fd

iTrader: (28)

heres my resister that i finally got to take out! It looks really coroded but the resistor wont just fix the problem because it doesnt blow at any speeds, right.

White94RX

I work at BMW. When our resistors go out (pretty common), sometimes they only blow one speed, sometimes not at all. It may fix your problem, may not. your blower motor could be bad.

JP's 93 fd

iTrader: (28)

[QUOTE=Piesareus]Hi new to the group and looking through post found I had the same problem you had recently.
I was not getting any responce form any of the heater controls including the AC not working, fans 1-4 not working, no little orange lights on the fan switch or on the posistion switch for air direction, the only thign that would work was the Hazard light switch.
I was only able to fix the problem by removing the heater controls and re soldering the circuits attached to the controls. [QUOTE]

I can't take off the platic cover with the contols on it. I tried pulling on it but only the top, bottom and right side poped off. Not the left. if the heater core was the problem, the little orange lights would still turn on right.

DaleClark

iTrader: (55)

PLEASE don't blindly yank on VERY expensive and brittle interior panels . Read my writeup on the proper way to remove them.

http://www.clubrx.org/default.asp?id...ntent=69&mnu=5

Dale

JP's 93 fd

iTrader: (28)

THANK YOU DALE!!! I would of broke something with out your help.

Venom13132

iTrader: (2)

I hate to pull up this old old thread. but I am interested to see if/how the problem was fixed.

JP's 93 fd

iTrader: (28)

wow, one of my old threads about my first fd! Yeah I fixed this problem not to long after I posted this. It was the rear wiper fuse. Yup, totally didn't check this fuse because I thought I didn't have to. rear wiper was removed so why put a fuse right? I checked the wire diagram then my automotive instructor at the time said to check out that fuse and what do you know it's missing. it some how fused to the blower motor relay. new fuse installed and now works in all speeds. it wasn't the resistor.

Venom13132

iTrader: (2)

haha hey, thanks for coming back to this old one. my car doesnt even have a rear wiper so yeah.... never put a fuse in there. long story short. I have some seriously warm heat in my car now!

Monkey D

iTrader: (4)

i know this is an old thread but thanks it helped me out a lot as well, i had the same problem before, and it was the rear wiper fuse, put one in and it works, pretty weird though lol.

JP's 93 fd

iTrader: (28)

Its fantastic that my thread is still helping people, god I miss my rx7!

cr-rex

iTrader: (114)

bumping an old thread because this in fact saved me. i pulled my rear wiper fuse because i dont have one. 5 months later when my car is being put back together my blower doesnt work. i never in a million years would have connected the 2

JP's 93 fd

iTrader: (28)

Happy it all worked for you. I have to upload a picture of the wiring diagram one day.

sheldement

iTrader: (2)

Bumping this thread before i take a hammer to my car. My rear wiper fuse keeps blowing on my 93 as soon as i turn the key on and i cant figure out why. It kills my climate control and throws an abs light on. Ive tried powering up with the rear wiper disconnected, heater relay and resistor disconnected, but still pops every time. My blower works in all speeds, but nothing else lights up or works on the climate control. Any thoughts? Much thanks!

Mike93r1

iTrader: (5)

Glad this thread popped back up. I'm experiencing the same issue. Where is this fuse located? Since the R1 didn't have rear wippers would this fix apply to it as well?
Thanks