Painless Performance Products 30112, Installation Instructions

2501 Ludelle Street 

Fort Worth, Texas 76105 

817-244-6212 Phone • 817-244-4024 Fax 

888-350-6588 Sales • 800-423-9696 Tech  

E-mail: painless@painlessperformance.com 

Web: www.painlessperformance.com 

30112

ADJUSTABLE FAN THERMOSTAT 

 INSTALLATION 

INSTRUCTIONS

 
 
NOTE:  This thermostat is to be used with a fan relay to control the fan. If you don’t already  

have a fan relay you must get one (Painless Part # 30101).  
 

1) 

Mount the thermostat assembly under the hood in a convenient location as close to the fan and 
relay as possible using the provided mounting screws. 

 
2) 

Take the thermostat probe and insert it into the radiator fins carefully as not to damage the radiator 
core.  

NOTE:  Be very careful when routing the probe and tubing to prevent kinking.  
 

NOTE:  Depending on the particular radiator you have you may not be able to insert the probe into 

the fins and may need to mount the probe to the back side of the radiator using plastic tie-
wraps, clamps, or a mounting bracket insuring the probe is in the hot air flow of the radiator. 

 
3) 

Locate the fan relay wire that goes to ignition hot power (relay activation wire) and cut it. 

Take and connect one of the cut ends to either thermostat terminal and take the other cut end and 
connect it to the other thermostat terminal.  

 
4) 

Test the thermostat for proper operation: 

When the knob is turned all the way counter clockwise the thermostat connects the two gray/white 
wires and the fan should come on when the ignition switch is turned on. 

Turning the knob clockwise will increase the temperature that is required to turn the fan on.  

 
 
 
 
 
 
 
 
 
 
30112.doc                                                                                                  

           07/22/03 

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