johny Posted February 19, 2023 Report Share Posted February 19, 2023 Out of interest can anyone tell me what the bourdon tube does on these heater valves? Is it for some sort of automatic control in which case where does it measure temperature? Link to comment Share on other sites More sharing options...
Pete Lewis Posted February 19, 2023 Report Share Posted February 19, 2023 had this on cars like avengers etc of the 70s it should pick off the heater output flow and helps maintain a steady output temperature when engine temperature is varying so yes a primitive temp controler Pete Link to comment Share on other sites More sharing options...
johny Posted February 19, 2023 Author Report Share Posted February 19, 2023 ha ha, so they had first generation climate control to make sure it didnt get too hot in the cabin! I can see why it wasnt necessary to keep that system in the Herald/Vitesse🤣 Link to comment Share on other sites More sharing options...
Colin Lindsay Posted February 20, 2023 Report Share Posted February 20, 2023 'New' one on eBay, £99. Link to comment Share on other sites More sharing options...
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