no. Power (heat) = V^2/R, so inversely proportional to resistance and squared directly proportional to voltage. So a really low resistance or a even just a smal boost in voltage will produce more power (heat).
On Wed, Dec 14, 2016 at 5:16 PM, John <[email protected]> wrote: > On 12/14/2016 7:19 AM, Bill wrote: >> >> On 12/14/2016 6:01 AM, David J Brooks wrote: >>> >>> On Tue, Dec 13, 2016 at 10:22 PM, Bill <[email protected]> >>> wrote: >>>> >>>> On 12/13/2016 9:09 PM, mike wilson wrote: >>> >>> >>>> >>>> Yeah. This is a brand new truck with just over 2000km on it. I'm >>>> going to >>>> let the dealer figure it out. It's good for them to learn new stuff. I >>>> really think it's a faulty block heater. On every other vehicle I've >>>> owned, >>>> unplugging the heater cable produces a spark at the plug (it's really >>>> dry at >>>> -20). This thing, no spark. >>> >>> >>> Bill. >>> >>> I test muy block heater with one of those live wire testers that you >>> just have to touch the cable and it beeps if current is going through >>> the wire. I think you know what tool 'm talking about. Got mind at CTC >>> for about $14 on sale. >>> >> >> They tested it at the dealership with something similar, said it's fine. >> I put an ohm meter across it and got very low resistance compared to the >> heater in my wife's little car. >> It has continuity, but I don't think it is making heat. >> > > I would think a block heater would have to have a higher resistance. > After all, isn't it resistance that causes it to heat up? Somewhere > there should be a specification telling what the DC resistance should > be. > > If it turns out yours has a substantially lower resistance, it would > indicate to me you've got a defective heater. > > I'm guessing here that the block heater heats the coolant? In that case, > is there any way to measure the temperature of the coolant while the > heater is plugged in & turned on? > > > -- > Science - Questions we may never find answers for. > Religion - Answers we must never question. > > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and > follow the directions. -- -- Reduce your Government Footprint -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
