Also: These block heaters have a built in thermostat in the cord, they will not run unless the temp is 0 degrees or lower. Not the best design IMO but oh well, it still works good. It keeps my coolant at 40 degrees in below zero weather. ...
is why my engine did not heat up any quicker this morning. dang!
The block heater was not available on the 2010 Cobalt; my local dealer could not get one for me. However, it is available at the manufacturer PhillipsandTemro
Part number 3400020, 300 watts, it includes a cordset, but no wire clamps.
Philips and Temro referred me to a distributor, Mill Supply in Cleveland: 216-518-2710. They can ship the part to your home.
Classic Chevrolet in Mentor, Ohio installed the block heater for no fee when I was having the electric power steering recall done. I will patronize Classic again!
Can I alter the cord set to eliminate the thermostat?
I bought the block heater to prolong engine life and to see if warm starts would give me better fuel economy. I have the block heater wired to a timer as my control system. The timer is rated to 1800 watts.
Originally Posted by Found in Phillips and Temro catalog
J 3600082 5 ft. (1.52m) GM Replacement Cordset with thermostat
J 3600083 5 ft. (1.52m) GM Replacement Cordset with silicone connector (No t-stat)
NOTE: 3600082 must be used in all 2006 and newer GM passenger cars to avoid a Check Engine Light.
I speculate that the ECM will report an error/CEL if the engine block temperature is warmer than the ambient temperature. Hopefully, one could just clear the message with the D.I.C. reset key. The ECM/DIC will quit complaining eventually. I am not sure, though.
Now I am considering ordering the "other" cordset to see what would happen. Or, I could cut into the old cordset.