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Old 12-02-2012, 08:55 PM   #1
Scooby Newbie
Member#: 339522
Join Date: Dec 2012
Default Newb question - Block heater problem

Hi guys, I have a Subaru Impreza year 2010. In my area, the temperature is really low, so these days I always plug in the block heater for a few hours before driving. I don't know much about cars, but I heard that if the block heater is working, it has some kind of "water boiling / running" noise when plugged in. So, every time when I plug it in, I listen carefully. And usually there is such noise. However, this morning, when I plugged it in, there wasn't any noise. After a few hours, I opened the hood and touched the engine part and other areas, they weren't heated up. Can I assume the block heater is not working? Thank you very much for your advice.
akuma is offline   Reply With Quote
Old 12-02-2012, 09:04 PM   #2
Scooby Specialist
Member#: 226864
Join Date: Oct 2009
Location: Southern NJ

Sounds like a safe assumption to make to me. You should fill out your profile.

You sure the cord you plugged it into has juice?
lavid2002 is offline   Reply With Quote
Old 12-03-2012, 02:40 PM   #3
Scooby Guru
Member#: 118209
Join Date: Jun 2006
Chapter/Region: MWSOC
Location: North Dakota
2015 WRX Limitec


Not all block heaters make noise, and the vast majority of the time you aren't going to be able to feel any warm parts. Do you have a kill-a-watt? Plug the heater in to that and see if its drawing power. You could also take a multimeter and check the resistance of the heater.
rkramer is offline   Reply With Quote
Old 12-03-2012, 03:18 PM   #4
Scooby Specialist
Member#: 118500
Join Date: Jun 2006
Chapter/Region: MWSOC
Location: Michigan
02 Silver Wagon
"Stage 2"


Make sure the outlet has power. I thought mine was borked until I realized my wife turned of the switch in the garage. lol
Bacon117 is offline   Reply With Quote

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