Quote:
Originally Posted by Isaac Zachary
I put in an OEM block heater on my Avalon, and it only heats it some 30 °F (17 °C) difference compared to ambient temperatures. It can also get down to -40 °F (-40 °C) here.
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That seems awfully low. My coolant heats up by around 30-33 C in 4+ hours. On my last car it was 40 C. Both 400 W block heaters.
What is the power rating of the heater? I'd check its resistance with a multimeter to make sure you don't have a wiring issue. Should be 33-36 ohms for a 400 W block heater.