 Thermotine question, D Jet issues |
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| robkammer |
 Jan 9 2026, 01:57 PM
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#1
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Member  Group: Members Posts: 239 Joined: 7-January 21 From: Vermilion Ohio Member No.: 25,049 Region Association: North East States  |
Happy New Year Teeners! Sorting out some small issues on our BB, and I'm hoping that someone can share some testing specs for a thermotine sending unit. I'm assuming it meters a 12volt signal from the control unit to the AAR. But as assumptions go, that's where I am.
Also, does anyone know if these are still available? Or does anyone have one in good working order they'd like to sell? Rob  |
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| ejm |
Jan 9 2026, 02:39 PM
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I can see the light at the end of the tunnel Group: Members Posts: 2,714 Joined: 3-February 03 From: Massachusetts Member No.: 224 Region Association: None |
Your picture is a decel valve
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| Superhawk996 |
Jan 9 2026, 02:50 PM
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#3
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914 Guru Group: Members Posts: 7,614 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch 
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The thermoswitch controls the cold start injector. Has nothing to do with the AAR.
The thermoswitch and cold start injector don’t even come into play unless vehicle and ambient temperatures are around 32F and below. Review the Anders overview of d-jet operation and components. https://pbanders.synology.me/914/djetfund.htm Thermoswitch can be tested by placing in the freezer and then monitoring continuity with a DMM as it warms back to room temperature. It should be closed when it first comes out and then should go open as it warms towards ambient. |
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