A/C Relay replacement
07-02-2004, 12:27 AM
#1
Addict
Rennlist Member
Rennlist Member
Thread Starter
Join Date: Apr 2004
Location: Kihei, Hawaii
Posts: 813
Likes: 0
Received 0 Likes
on
0 Posts
A/C Relay replacement
Ok folks, I am about to replace the A/C relay in HVAC head unit in my '94 GTS. Sometimes the A/C works fine, like about 10 days ago. This week, nothing.
The existing relay looks to be a 2 amp unitSDS Relays, DSP2a-DC12V. I bought the Radio Shack 10 amp relay, 275-0218.
I have printed Dr. Bob's diagram and instructions (note to self, get magnifying glass to read the .pdf file from Dr. Bob).
Can anyone tell me where to get a solder wick or vacuum desoldering tool? I will make a call to Radio Shack tomorrow. Hope to get this done on Saturday morning. When the A/C works, it blows nice and cold, about 33 degrees F from the top vent.
I will take pics and post when done. Wish me luck.
The existing relay looks to be a 2 amp unitSDS Relays, DSP2a-DC12V. I bought the Radio Shack 10 amp relay, 275-0218.
I have printed Dr. Bob's diagram and instructions (note to self, get magnifying glass to read the .pdf file from Dr. Bob).
Can anyone tell me where to get a solder wick or vacuum desoldering tool? I will make a call to Radio Shack tomorrow. Hope to get this done on Saturday morning. When the A/C works, it blows nice and cold, about 33 degrees F from the top vent.
I will take pics and post when done. Wish me luck.
07-02-2004, 01:39 AM
#2
Rennlist Member
Radio Shack will have the solder wick. Generally I find it easier to remove components like this using a very narrow-nozzle heat gun to heat all the pins simultaneously. When they are all melted, pull the relay then clean up the holes with solder wick and a soldering iron. Solder wick alone will not be enough to completely desolder the old pins. Also, the little spring-loaded "solder sucker" vacuum unit is going to be useless if the circuit board has that heavy varnish on it. They are nearly useless under the best of circumstances.
07-03-2004, 12:44 AM
#3
Addict
Rennlist Member
Rennlist Member
Thread Starter
Join Date: Apr 2004
Location: Kihei, Hawaii
Posts: 813
Likes: 0
Received 0 Likes
on
0 Posts
Went to the electronics store at lunch today. After softball game and some dinner (with adult icy cold beverage), I go to the garage. Now it's 2.5 hours later. The A/C relay is changed out, everything is back together and.........IT WORKS!!
Desoldering suction tool.....................$15.75
Solder wick.............................................2.95
18 guage wire, 25 foot rool....................3.99
Solder.....................................................1.69
Shrink wrap, 4 foot piece 1.40
10amp Radio Shack relay, 275-218 8.50
Head unit relay replacement successful................PRICELE$$
For everything else, there's MasterCard
Best damn 3 hour project ever. Thanks to Dr. Bob for his excellent writeup and the recent posts that detailed this project.
http://forums.rennlist.com/upload/as..._side_view.jpg
Desoldering suction tool.....................$15.75
Solder wick.............................................2.95
18 guage wire, 25 foot rool....................3.99
Solder.....................................................1.69
Shrink wrap, 4 foot piece 1.40
10amp Radio Shack relay, 275-218 8.50
Head unit relay replacement successful................PRICELE$$
For everything else, there's MasterCard
Best damn 3 hour project ever. Thanks to Dr. Bob for his excellent writeup and the recent posts that detailed this project.
http://forums.rennlist.com/upload/as..._side_view.jpg
