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When heater turned on temperature gauge shows cold in my ford ranger 4 cylinder engine? Truck warms up normally and temperature gauge sets where it should set, but when I turn on the heater gauge backs off to cold.

  • Did you try bleeding the system? – sjfklsdafjks Nov 20 '17 at 14:33
  • Can you tell me how to do that? Do you mean cooling system? – steve ingham Nov 20 '17 at 14:38
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    Yeah, there should be a bleeder screw on somewhere on the coolant passages, you’d have to look at an online manual for your car or something like that to see it’s location, I don’t have time now but maybe someone else can explain to you the bleeding process, good luck!! – sjfklsdafjks Nov 20 '17 at 14:45
  • Welcome to Motor Vehicle Maintenance & Repair! What year is your Ranger? Is this the 2300 or 2500 I4 engine (or something else)? – Pᴀᴜʟsᴛᴇʀ2 Nov 20 '17 at 16:00
  • 1997 Ford Ranger with a 2.3 liter 4 cylinder engine – steve ingham Nov 20 '17 at 16:22

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