 Heater Control question |
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| Black914_4 |
 Jan 19 2012, 07:11 AM
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#1
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Member  Group: Members Posts: 272 Joined: 11-January 12 From: AR Member No.: 13,994 Region Association: South East States  |
Would someone mind explaning how the heater controls work please.
I have the '74 914 with the 2.0. I need to know what levers does what. ie. - middle lever moved to left does ..., to the right does.., bottom lever moved to left or right does... Thanks |
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| Dave_Darling |
Jan 19 2012, 12:42 PM
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#2
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914 Idiot Group: Members Posts: 15,161 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California 
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And far right on the top lever should turn on the fresh air blower. If the fan motor still works, that is.
--DD |
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| flipb |
Jan 19 2012, 01:13 PM
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#3
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Senior Member Group: Members Posts: 1,810 Joined: 2-September 09 From: Fairfax, VA Member No.: 10,752 Region Association: MidAtlantic Region
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QUOTE(Dave_Darling @ Jan 19 2012, 01:42 PM)  And far right on the top lever should turn on the fresh air blower. If the fan motor still works, that is. --DD I always thought that the top lever was sort of a rheostat for the vent fan. Left=off, middle = varying degrees of on; Right = blowing full blast (which isn't much!) Am I mistaken? I vaguely remember testing it with the engine off (ignition turned on) and listening to the sound of the fan at different settings. |
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| Dave_Darling |
Jan 19 2012, 04:03 PM
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#4
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914 Idiot Group: Members Posts: 15,161 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California
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QUOTE(flipb @ Jan 19 2012, 11:13 AM) I always thought that the top lever was sort of a rheostat for the vent fan. Not really a rheostat, no. At the far left, the fan is off and the flaps from the inlet in the cowl are closed. As you slide the lever to the right, the flaps from the inlet are gradually opened up. I think they're fully open somewhere past halfway. Then you get to the fan on low speed, then the fan on medium speed, then the fan on high speed. Those are done with resistors, so that is sort of kind of like a rheostat. Sort of. Some or all (?) of the panels have marks for the fan, you'll see "I" and "II" and "III". Those are approximately where the fan comes on at that speed. --DD |
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| mrholland2 |
Jan 19 2012, 05:00 PM
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#5
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Senior Member Group: Members Posts: 761 Joined: 7-September 11 From: Santa Maria,CA Member No.: 13,531 Region Association: Central California |
How "needed" is the fresh air part? Is it a safety issue? I'm thinking of reworking this whole system a teeny bit. . but maybe not? I live in an area where it could be 80 in the day and 40 at night. Or blizzard, like right now, but I wouldn't drive the 914 in the blizzardy weather.
QUOTE(Dave_Darling @ Jan 19 2012, 02:03 PM) QUOTE(flipb @ Jan 19 2012, 11:13 AM) I always thought that the top lever was sort of a rheostat for the vent fan. Not really a rheostat, no. At the far left, the fan is off and the flaps from the inlet in the cowl are closed. As you slide the lever to the right, the flaps from the inlet are gradually opened up. I think they're fully open somewhere past halfway. Then you get to the fan on low speed, then the fan on medium speed, then the fan on high speed. Those are done with resistors, so that is sort of kind of like a rheostat. Sort of. Some or all (?) of the panels have marks for the fan, you'll see "I" and "II" and "III". Those are approximately where the fan comes on at that speed. --DD |
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Posts in this topic
2xs performance Heater Control question Jan 19 2012, 07:11 AM
flipb This is from memory, so others please correct me i... Jan 19 2012, 08:19 AM Cevan Top lever controls the speed of the fresh air fan.... Jan 19 2012, 01:55 PM Dave_Darling Only you can tell how "needed" it is. I... Jan 19 2012, 06:32 PM GeorgeRud It's nice to be able to use both the fresh and... Jan 19 2012, 09:23 PM
johannes
It's nice to be able to use both the fresh an... Jan 20 2012, 08:00 AM 2xs performance I appriecate the help. That was what I needed to k... Jan 20 2012, 06:54 AM partwerks You'd think that with the squirrel cage helper... Jan 20 2012, 08:05 AM 442nd914s Hope you guys don't mind if I piggy back off o... Apr 14 2013, 08:25 PM Dave_Darling
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