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Removing heater knobs on a 409

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Old 24-02-20, 09:20 PM
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Default Removing heater knobs on a 409

I'm in the process of removing my dash and I'm wondering how to remove the two heater control knobs. I see two holes on each knob and assume there is a pin holding them in. But before I start pounding, I thought I had better check with someone more familiar. Thanks in advance.
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Old 25-02-20, 10:15 AM
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Quote:
Originally Posted by LarryW View Post
I'm in the process of removing my dash and I'm wondering how to remove the two heater control knobs. I see two holes on each knob and assume there is a pin holding them in. But before I start pounding, I thought I had better check with someone more familiar. Thanks in advance.
Yes you assume correctly Larry, there is a pin in each of the holes that has to be removed first.
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Old 25-02-20, 01:17 PM
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John, how does one remove the "pin" ?
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Old 27-02-20, 07:35 PM
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Default Removing heater knobs

Restoring 401 dashboard

Heater Knobs on 411 Series 3

It appears there is a spring-loaded retaining pin.

Last edited by LarryW; 27-02-20 at 07:42 PM.
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Old 28-02-20, 11:03 PM
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There is indeed a hexagonal shaft with a spring loaded pin on the 411, which you need to push in - I used a small allen key to do so. See attached photo.

I assumed the 409 was different given John's comment about removing a pin.
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File Type: jpg 411-heater-control-shaft.jpg (113.4 KB, 7 views)
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Old 29-02-20, 12:52 AM
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Default Removing heater knobs on 409

Got them off. Thank you! I assume the two smaller knobs are removed with a simple screw. (mine are corroded away).
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Old 01-03-20, 04:55 AM
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Quote:
Originally Posted by LarryW View Post
Got them off. Thank you! I assume the two smaller knobs are removed with a simple screw. (mine are corroded away).

Larry, it pains me to say that I don't have a picture of the 409 heater controls (given that the 409 was the first Bristol I ever drove), so I'm not sure what smaller knobs you refer to - my 411 only has two.


Perhaps you could post a picture of yours?
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Old 01-03-20, 01:03 PM
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From long distant memory, which aligns with some photos I happen to have of a catalogue of Lucas rotary switches of the period, the wiper motor switch and the panel light rheostat also utilise spring loaded pins. From more recent memory the selectaride switch (did the 409 have selectaride) used a screw fixing.

Have plenty of labels handy if you have to disconnect any wires, the wiper motor switch is a particular nightmare if any get ever confused.

While you are at it, if you ever want to see the instruments in the dark, may I recommend changing the instrument lighting bulbs for LEDs. I found that if one leaves the filament bulbs in the lighting above the heater controls and other switches their current drain is sufficient to allow the original panel light rheostat to dim the instrument light LEDs, whereas if you change all to LEDs it probably won't and you'll also have to change the rheostat to retain dimming.

Changing the interior light to an LED is also much recommended.

Roger
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Old 03-03-20, 02:06 AM
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Default Removing heater knobs on a 409

One knob is the wiper speed control and the other is labeled C.
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Old 07-03-20, 02:49 AM
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Sorry about the delay in responding Larry. On my 411 the two knobs are panel lighting (see photo attached) and wiper control. I just checked and as Roger rightly says, they do have spring loaded pins like the heater control knobs.
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Old 12-03-20, 02:53 AM
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Default Removing heater knobs

An unusual request: My wiper know is off but it's cracked unfortunately. I've located a replacement at Spencer Lane-Jones but they don't ship to the US. Would anyone be willing to have the knob shipped to him and then forward it on to me? I can pay for it and cover your postage etc. if you have a Paypal account. You can reach me at robinlarry@aol.com.
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Old 13-03-20, 09:46 PM
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Hi Larry

Have you tried just putting “wiper knob” into ebay?

If yours says “press for washer” it’s the same as one for an Aston. Otherwise, it’s the same as some Jaguars.

I had the same issue as you - I broke the one on my 408 - and just got a replacement from eBay.
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Old 14-03-20, 09:40 PM
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https://www.ebay.com.au/itm/ASTON-MA...0AAOSwpDdU24Vd

Check this site out
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Old 15-03-20, 03:05 AM
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Default wiper knob for 409

Thank you! I just purchased a brand new Jaguar knob matching my broken one.
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