I have a feeling it isn't working. How would I test it? Are there replacements available for it?

Plug in and listen, you should hear it after a few minutes. You can also test resistance across the power cord with a normal volt/ohm tester. Or use a device like a kill-a-watt to measure power usage.

__________________
-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)

When I plug it in, I don't hear anything. Mulitmeters are easy when testing voltage. Testing ohms is a grand mystery. What should the correct ohms be for the block heater? Any advice on testing it with a cheap Cen-tech that I picked up at Harbor Freight?

perhaps this is terrible advice but.. touch it? When i bought my 72 I was curious if the block heater worked. So I plugged it in and briefly touched it and noticed it was hot! maybe wear a glove, or touch the hose / area near it but not he heater itself?

For resistance just (unplugged) put the probes across each terminal. I dont know the desired resistance, but any meter should work.

Easier yet, plug it in and put your hand on top of the motor after a few hours. Should be pretty obvious if the valve cover is warm. No hand burning here. Just did this a couple weeks ago after new cord install. Surprised how the whole motor was warm to the touch.

Buy an infrared thermometer and check when it is plugged in. Hey, any reason to buy a new tool, right?

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“Whatever story you're telling, it will be more interesting if, at the end you add, "and then everything burst into flames.”
― Brian P. Cleary, You Oughta Know By Now

Check the current draw.........

Well, for some reason, I have 175 watts stuck in my head. Resistance (ohms) = Volts squared divided by watts. So we know the volts, 115, and the watts, 175. Equals 75ish ohms. Any meter will do, we're not talking micro circuitry here.
Also try checking resistance at the element in case its your cord that's bad. Obviously, check the outlet, too.

Plug it in for an hour and feel it. Not complicated and no meter required.

If you have a multimeter, put it on ohms. I'm thinking anything less than a hundred. If its hundreds, clean the contacts and try again, if the contacts are clean and it's an open circuit (thousands of ohms/end of the scale) then it's bad.

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CC: NSA

All things are burning, know this and be released.

82 Benz 240 D, Kuan Yin
12 Ford Escape 4wd

You're four times

It's hard to

more likely to

concentrate on

have an accident

two things

when you're on

at the same time.

a cell phone.

www.kiva.org It's not like there's anything wrong with feeling good, is there?

FYI, the wall plug end of the cord on my SDL was bad...that is why it was 'broken'. Fresh cord fixed my issues.

I suppose it could burn out, but suspect the cord before heating element.

Or like last poster said, plug in for a while.

Hell, I can hear mine when first plugged in. Put ear down there and listen close

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I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]

Make sure you touch the leads of the meter together first, they should go to zero or nearly zero resistance. Test the test tool first.

I never did get a cord that worked for my block heater. I have a magnet mount heater but have never used it. 5w-40 oil and good glow plugs and battery and I've never had any trouble starting, even with temps in the teens and with a glow plug out.

Where are you located, OP? You may not need a block heater.

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617 swapped Toyota Pickup, 22-24 MPG, 50k miles on swap

If the cord turns up bad someone here gave me the P/N for the new cord @ NAPA, they'll prolly re post it now .

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-Nate
1982 240D 408,XXX miles
Ignorance is the mother of suspicion and fear is the father

I did then what I knew how to do ~ now that I know better I do better

NAPA part # KAT 28216

https://www.napaonline.com/en/p/KAT28216

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Milan Brown 1979 240D, rebuilt OM617.952 turbo diesel, rebuilt 722.315 transmission (my only daily driver)

Instagram: @maximed93

Its closer to 290 watts or so. The heater on my OM601 averaged 293 watts or so when operating.

__________________
-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)