Specifications
TM039 Rheem Water Star Service Instructions REV: A 
Date of Issue: 02/09 
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13 
Component Tests 7 & 8 
Test 7 
Using a multimeter on the x1 resistance 
scale,  measure  the  resistance  of  the 
element across the wires that connect to 
terminals 2 and 4 of the thermostat. 
Normal resistance for the element is 68-
79 ohms.  
Test 8 
Using a multimeter on the x1 resistance 
scale,  measure  between  active  and 
neutral on the terminal block. 
Normal  resistance  when  the  thermostat 
contacts are closed is 68 - 79 ohms 










