AC and interior fan problems

2002_zts · 03-28-2007, 10:55 PM

Well I am having a batch of problems with my car right now and was wondering if anybody could help out.

On the 11th my battery and alternator went out and were replaced at a cost of over $400.

Yesterday (25th) I washed my car.

Now my horn sounds as if it is muffled or full of water which I could care less about since I never use it.

What really bothers me is that my interior fan is not working any more. It worked fine (i think) this morning.

The problem is that I can press the AC button and turn the controller to positions 1-3 and the AC light stays on, but the fan will not come on. In position 4 the fan starts to blow at full force, but the AC light goes out. I have the same problems with the fan blowing without the AC on as well.

Now what could be the problem with my car? I really enjoy driving my 2002 Focus . It only has 69000 miles (just clocked at 4AM) on it. I would hate to have things keep going wrong on it. But, it seems par for course with Ford, that once things start going bad, everything starts going out.

Don't get me wrong, I love my Fords, and have always drivin Fords, as well as did my parents while I was growing up. But a Charger or Magnum is looking like it may want to be parked in my driveway more than the Focus.

Let me know what you think the problems may be, and where I should look to examine these new problems with the interior air.

Thanks

jeff

drjkel · 03-29-2007, 05:59 AM

It sounds suspiciously like your heater blower resistor assembly is bad. This assembly is used to reduce the fan motor speed on lower settings and is bypassed on the highest fan speed. Usually the thermal limiter on the assembly goes open. A new part retails from Ford for $15.51 and is easily replaced. The following thread shows where it is located:

http://www.focusfanatics.com/forum/s...d.php?t=106631

It can be easily troubleshot with a volt-ohm meter once removed. You must have continuity through the thermal limiter (silver "bullet") on the top or it is defective. Coincidentally, I just had this happen on my 2001 ZTS last week also after washing it.

Let the forum know how you make out. Good luck.

- drjkel

2002_zts · 03-29-2007, 07:32 PM

Thats what it was.

i also found this post that really helped too. http://www.focusfanatics.com/forum/s...threadid=24988

You will need:
A. The new resistor pack.

B. An 8mm socket and suitable handle.

C. A flashlight (optional).

Step by step:
1. Open the glovebox, and empty it.
2. Squeeze the sides of the glovebox and drop it down.
3. Locate the resistor pack just to the left of the blower.

4. Squeeze the tab on the connector to the resistor pack and remove connector.

5. Remove the 8mm hex-head screw holding the resistor pack. Once loosened, it can be unscrewed by hand (don't drop the screw!). I found it easier to come from the bottom of the glovebox. Just pull the carpet/liner to the side from the left corner near the floor vents.

6. Lift the resistor pack from the bottom, it swings up and out.

Installation is the reverse of removal. Don't overtighten that screw!

Took me all of 30 min to do including the drive to the dealership to get the part and to take pictures while changing the part.

Now I just need to figure out what these wires are for.

sebaland · 12-18-2008, 03:44 PM

Thanks!

BigEd · 07-27-2009, 04:26 PM

Have you had this car since new?

If not, then the possibility of keyless entry, remote start, or some other alarms system is possible, or a connection for an aftermarket stereo component.

I had a speaker to preamp adapter behind the factory radio in my 00 zx3 and then rca wires to the 2 15's subs and 600 watt amp in the hatch area. I actually had the shelf that connected to the hatch set so it would cover it completely when dropped and you never knew that setup was in the rear until I turned it on. I had people tell me they could hear me from 2-3 blocks away and it sounded excellent then.....

03-28-2007, 10:55 PM	#1
2002_zts Focus Rookie Join Date: Oct 2006 Fan#: 40104 Location: san diego, chula vista What I Drive: 2002 CD silver Mach edition ZTS Posts: 13 FF Reputation: 1 Buy-Sell-Trade Rating: (1)	AC and interior fan problems Well I am having a batch of problems with my car right now and was wondering if anybody could help out. On the 11th my battery and alternator went out and were replaced at a cost of over $400. Yesterday (25th) I washed my car. Now my horn sounds as if it is muffled or full of water which I could care less about since I never use it. What really bothers me is that my interior fan is not working any more. It worked fine (i think) this morning. The problem is that I can press the AC button and turn the controller to positions 1-3 and the AC light stays on, but the fan will not come on. In position 4 the fan starts to blow at full force, but the AC light goes out. I have the same problems with the fan blowing without the AC on as well. Now what could be the problem with my car? I really enjoy driving my 2002 Focus . It only has 69000 miles (just clocked at 4AM) on it. I would hate to have things keep going wrong on it. But, it seems par for course with Ford, that once things start going bad, everything starts going out. Don't get me wrong, I love my Fords, and have always drivin Fords, as well as did my parents while I was growing up. But a Charger or Magnum is looking like it may want to be parked in my driveway more than the Focus. Let me know what you think the problems may be, and where I should look to examine these new problems with the interior air. Thanks jeff __________________ [B]2002 ZTS MACH edition[/B] MODS: FFRP Multimatic Suspension, SVT front bumper w/ fogs, ROUSH front bumper/sideskirts (awaiting paint), TBS, Modified intake FUTURE MODS: ROUSH hood scoop, Window tint, Saleen TSW or 04 SVT rims

03-29-2007, 05:59 AM	#2
drjkel Focus Enthusiast Join Date: Apr 2006 Fan#: 34025 Location: WNY What I Drive: 2001 Amazon Green ZTS Posts: 157 FF Reputation: 9 Buy-Sell-Trade Rating: (1)	It sounds suspiciously like your heater blower resistor assembly is bad. This assembly is used to reduce the fan motor speed on lower settings and is bypassed on the highest fan speed. Usually the thermal limiter on the assembly goes open. A new part retails from Ford for $15.51 and is easily replaced. The following thread shows where it is located: http://www.focusfanatics.com/forum/s...d.php?t=106631 It can be easily troubleshot with a volt-ohm meter once removed. You must have continuity through the thermal limiter (silver "bullet") on the top or it is defective. Coincidentally, I just had this happen on my 2001 ZTS last week also after washing it. Let the forum know how you make out. Good luck. - drjkel Last edited by drjkel; 03-29-2007 at 04:52 PM.

03-29-2007, 07:32 PM	#3
2002_zts Focus Rookie Join Date: Oct 2006 Fan#: 40104 Location: san diego, chula vista What I Drive: 2002 CD silver Mach edition ZTS Posts: 13 FF Reputation: 1 Buy-Sell-Trade Rating: (1)	Thats what it was. i also found this post that really helped too. http://www.focusfanatics.com/forum/s...threadid=24988 You will need: A. The new resistor pack. B. An 8mm socket and suitable handle. C. A flashlight (optional). Step by step: 1. Open the glovebox, and empty it. 2. Squeeze the sides of the glovebox and drop it down. 3. Locate the resistor pack just to the left of the blower. 4. Squeeze the tab on the connector to the resistor pack and remove connector. 5. Remove the 8mm hex-head screw holding the resistor pack. Once loosened, it can be unscrewed by hand (don't drop the screw!). I found it easier to come from the bottom of the glovebox. Just pull the carpet/liner to the side from the left corner near the floor vents. 6. Lift the resistor pack from the bottom, it swings up and out. Installation is the reverse of removal. Don't overtighten that screw! Took me all of 30 min to do including the drive to the dealership to get the part and to take pictures while changing the part. Now I just need to figure out what these wires are for. __________________ [B]2002 ZTS MACH edition[/B] MODS: FFRP Multimatic Suspension, SVT front bumper w/ fogs, ROUSH front bumper/sideskirts (awaiting paint), TBS, Modified intake FUTURE MODS: ROUSH hood scoop, Window tint, Saleen TSW or 04 SVT rims

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12-18-2008, 03:44 PM	#4
sebaland Focus Rookie Join Date: Oct 2005 Fan#: 28390 Location: argentina Posts: 1 FF Reputation: 1 Buy-Sell-Trade Rating: (0)	Thanks!

07-27-2009, 04:26 PM	#5
BigEd Focus Jr. Enthusiast Join Date: Aug 2006 Fan#: 38134 Location: Pocahontas, AR Posts: 45 FF Reputation: 1 Buy-Sell-Trade Rating: (0)	Have you had this car since new? If not, then the possibility of keyless entry, remote start, or some other alarms system is possible, or a connection for an aftermarket stereo component. I had a speaker to preamp adapter behind the factory radio in my 00 zx3 and then rca wires to the 2 15's subs and 600 watt amp in the hatch area. I actually had the shelf that connected to the hatch set so it would cover it completely when dropped and you never knew that setup was in the rear until I turned it on. I had people tell me they could hear me from 2-3 blocks away and it sounded excellent then.....