WebAug 12, 2013 · Many use bypass valves. Some (including Fords) don't use any kind of shut off, they run coolant unrestricted coolant through the heater core all the time. Temperature control is accomplished by changing air paths only. So the way I look at it that by going with a bypass valve we are moving with the times. WebApr 14, 2024 · You can bypass the whole servo mess by either connecting the supply and return lines from the engine to each other, or you can bypass the servo mess and leave yourself the option of have heat sometimes by connecting the engine hoses straight to the heater core hoses, with just a cutoff valve inserted into the circuit somewhere.
How a Heater Control Valve Works (with Diagram)
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WebFeb 27, 2024 · I would fix whatever is wrong. There are only two switches and a resistor in the heat delivery system. You have the high, medium and low switch plus a white plastic micro switch just to the right of the hi, med, lo switch and inside the heater control panel. The resistor is attached to the heater box, just behind the glove box. WebMar 31, 2014 · I understand the regulating control valve is mounted above the valve cover in the engine bay, this valve is activated by a small on/off vacuum switch located on the left side of the heater box inside the car. This little valve has 2 ports i assume one port is for vacuum coming from the intake manifold, and the other port going to the heater ... WebAnswer (1 of 7): I could tell you but I will not as you could damage your system if you bypass it. If it is giving you problems I suggest that you call a tech to repair or replace it. cpt code for removal of interstim battery