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#1
02-20-2009, 12:10 PM
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Can someone measure thier block heater?
Im getting to think my block heater on the 240d is dead.. Does anyone know the resistance across the plug?
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#2
02-20-2009, 12:17 PM
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I checked continuity across the electrodes of my NG block heater and got none which reads as the numeral "1" on my DVM. If it is good, it should read near or at "0" which is what the new heater reads.
__________________
1981 240D 143k 4 spd manual -SOLD 2004 VW Jetta TDI 5 speed 300k -still driven daily
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#3
02-20-2009, 12:30 PM
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do you have an ammeter that clamps around a wire?
they are pretty cheap at harbor frieght.... it's a great way to see what loads are being used around the house - and is a great tool for a question like this - use the meter on the wire going to the block heater when it's plugged in - if there's no amperage flowing - you know you've got a problem. Probably a good idea to remove and inspect the cord and plug too for resistance, as well as the heater element itself.
__________________
95 E300 Diesel 265k and counting
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#4
02-20-2009, 02:03 PM
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Should be around 20 to 40 ohms.
__________________
Ron Schroeder '85 300 Turbo Diesel 2 tank WVO '83 300 Turbo Diesel 2 tank WVO Some former WVO vehicles since ~1980: '83 Mercedes 240D '80 Audi 4000D '83 ISUZU Pup '70 SAAB 99 with Kubota diesel '76 Honda Civic with Kubota diesel '86 Golf Several diesel generators All with 2 tank WVO conversion LI NY
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#5
02-20-2009, 02:31 PM
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Those clamp amps should work. I just happened to measure both my 240D and 300D block heater with a Kilawatt (spell?) and it was 480 watts. At 120V, per ohms law, makes it 30 ohms.
Quote:
__________________
85 300D turbo pristine w 157k when purchased 161K now 83 300 D turbo 297K runs great. SOLD! 83 240D 4 spd manual- parted out then junked
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