40 Heater Fan Motor Draw??

[hotrodA]

I'm restoring my 40 hot water heater.

What amperage does the stock 6V motor draw on high speed?

Thanks in advance!

[koates]

Well I don't have a 40 car heater to test but I would expect somewhere around 4 amps on 6 volt system. Regards, Kevin.

[JSeery]

Highest current draw will be at start up of the fan.

[hotrodA]

Thanks.

So does anyone have that spec? Just need it for appropriate fusing and voltage drop.

Can't hook it up right now to check it.

Thanks!

[Ken/Alabama]

Originally Posted by hotrodA

I'm restoring my 40 hot water heater.

What amperage does the stock 6V motor draw on high speed?

Thanks in advance!

Where can I get the correct color paint for the 40 heater case?

[FortyNiner]

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FWIW, the heater wiring in the 46-49 vehicles I've messed with have had 10 amp fuses. This may be of interest.

[Ziggster]

Originally Posted by FortyNiner

FWIW, the heater wiring in the 46-49 vehicles I've messed with have had 10 amp fuses. This may be of interest.

Interesting. They mention a circuit breaker in the parts list but nowhere else is it mentioned. From what I could gather it was just connected to the ignition switch.

[JSeery]

A fuse is to protect the wiring, you select a fuse size that will match the wiring gauge. With a motor start up you might use a slightly larger fuse for the start up current or at least a slow blow fuse. If it turns out the fuse is to small, increase the size with the replacement.

[hotrodA]

Originally Posted by FortyNiner

FWIW, the heater wiring in the 46-49 vehicles I've messed with have had 10 amp fuses. This may be of interest.

Thanks! I've printed that off.

[35fordtn]

Bill out of curiosity to this question I checked a NOS motor tonight and it pulled 7 amps at first start up and settled at 4.8 amps.

[fortyonerag]

Yup^^^^^^

I can tell you my 41 heater motor draws around 5 amps on 6V.

[big job]

Again just curious; engine running showing amp meter charging. Turn on heater and
test the plus side of the heater switch and test the 'out going to the motor' heater on
full or high- with a volt meter. No wonder I'm freezing I get about 4-5 volts and my
generator putting 7 plus volts 20 amps fast idle. So with a long #10 ga. jumper from
the battery and jump the 'out motor terminal' at the switch, now the motor is now
delivering air and sounds like a heater. I suspect the switch with its resistors is gone
south because if I put switch on 'low' the fan barely turns. this is a 1946 and this switch is not like what's in the shop book. My high heat is 11 o'clock and defrost is 1 o'clock.
Not what the book says, which is 1 o'clock heat and 11 o'clock defrost??? And the
switch looks or is a normal FoMoCo switch. Thats the way I bought it. so any one know
what my switch come from? And note, my 1949 F8 6vt pos grd. heater switch is,
turn right heat, left defroster, and it will burn ya boots off. Think I will put a simple
toggle switch there so I get heat: Ideas for pricey hard to get, these switches yes
they pop on ebay time to time and venders but its the old "what if" Just ramblin
on again. back to this post, I worry more about the supplied volts than amps. sam

[hotrodA]

Originally Posted by 35fordtn

Bill out of curiosity to this question I checked a NOS motor tonight and it pulled 7 amps at first start up and settled at 4.8 amps.

Yaaaay! Thanks very much, my friend! Perfect!