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EFV-8 Club Forum / General Ford Discussion / 1941 hot water heater

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Discussion Topic: 1941 hot water heater -- page: 1 2

42merc

11-07-2016 @ 4:36 PM

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John, I have a stock 6 volt reversible motor '41 heater in my 12 volt wired '40.
My fix was to simply use a resistor sourced from Mac's to reduce the voltage.
'41 switch with 6 volt lamp & heater. Been working for several years.
Part number for the resister in Mac's catalog is V12873, about 12 bucks.
Do not use an ignition resister, won't carry the amperage.
Go on the Ford Barn & do a search for wiring diagrams for the heater. They have been posted several times.

Don

This message was edited by 42merc on 11-7-16 @ 4:40 PM

TomO

11-07-2016 @ 8:41 AM

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Jehn, you should be able to find a 12 volt motor or a shop that can replace the field coils in yours in Sweden. European cars switched to 12 volts before the US cars.

You could also leave the car at 6 volts because all of the original systems will work fine with 6 volts.

Tom

jehn

11-07-2016 @ 5:03 AM

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Thank you guys, I think I have got the answers I needed about the heater blower.

jehn

11-06-2016 @ 7:15 AM

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Woodiwagon46, I appreciate your offer but I live in Sweden and must be 100% sure that a new motor will fit right in to my heater and have the reversing function.
That will also me much more than $100 for me to get it here. But thanks again.

woodiewagon46

11-06-2016 @ 4:31 AM

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john, I gave you all the information you are asking for, 12V, reversible and fits like it was made for it, all for about $100. What more can I possibly do for you?

jehn

11-05-2016 @ 11:37 AM

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Thanks TomO, I will look at that link and fond out the resistor for my application.

TomO

11-05-2016 @ 9:05 AM

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You would be better off finding a 12 volt motor with brushes, the size of your heater motor and then re-wiring the motor so that it is reversible. Another option is to have 12 volt field coils installed in your heater motor.

If you still want to use a resister, go to the Ohms Law Calculator and plug in the voltage drop and the current draw. It will give you the ohms and watts.

http://www.ohmslawcalculator.com/ohms-law-calculator

Tom

jehn

11-05-2016 @ 4:07 AM

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I know it is possible to put in 12V blowers but I think it is a little problem to get the right one just for the specific heater. I also want to have the original functions as above mentioned and want to have the original look when using 12V. Therefore I prefere to get the solution with a resistor as voltage reducer. I have seen ceramic resistors specific for blower application on the web.
I wish to know if anyone have used them and if they are good working and not became over heated etc.

This message was edited by jehn on 11-5-16 @ 4:25 AM

jehn

11-05-2016 @ 3:44 AM

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Thanks Cliftford, that was what I wanted to hear. My blower works exactly as you describe with reversing rotation
when turning the switch. I thought that must be wrong but you got me the answer.

GK1918

11-05-2016 @ 12:45 AM

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I have a friend with a late 1990s Econoline. The owner replaced the
heater motor from Napa. He came to our shop because the fan runs
but no air delivery. So whoever produces these for Napa has some
generic wire connector. All we did was cut wires and reverse them
so now its turning the correct way and blowing. We find most of
these later motors are of the permanent magnet type and depend
of polarity for rotation= correct me if wrong I'm not a elect. motor
shop but seems those 6vt heater switch's are doing the same thing
by reversing field polarity. For a resistor you may want to try a
late Ford Truck resistor. I'm picturing my own 97 F350, its under the
hood just below the heater motor- on the shelf at Napa. Also these
glow red too so isolate it It gets hot...........

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