rad fan woes

[fjbauer@dsavm.e-mail.com]

Frank J. Bauer                                                                  
dassault systemes of America     email:fjbauer@dsavm.e-mail.com                 
Subject: rad fan woes                                                           
i have been running the TqW for a few days and things seem to be functioning    
properly with the rad fan 2nd stage.  i have been using a sacrificial relay     
until i am sure that it's not going to eat another one soon.  this relay is     
an unused part from a hella horn kit and looks super cheap so i don't care      
what happens to it but it's only rated for 30 amps, so i don't want to stress   
test it just yet.  (no stop and go in 90 degrees for me)                        

i am still puzzled by how two relays burned in a short time.  i can think of    
three possibilities:                                                            
- the fan is going and is drawing too much current in it's current state        
- the temp switch is sticking on intermittently, causing the fan to continue    
  running until the relay heats ups and melts (this happened in 10-20 minutes   
  last week)                                                                    
- the relay is poorly designed/constructed or improperly specified at 40A.      

i still haven't decided if i burned the fuse/relay panel bad enough to          
replace it.  then i can go back to fixing the fresh air blower electrics.       
any thoughts or experience would be appreciated...                              
frank