Volvo AWD 850 Forum

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Heater not hot what is the cause ?? 850

My friend Nissan old man need my help and I want to hepling out with my labor.

here is the problem.. car run great no over heat problem...
no water leak... Just the heater not hot only warm...

blower work great full blash.. you can feel the air force...

what can it be ?? heather Thermostast stuck ?? bad heater core ???

any good input are wellcome...

Thanks...








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    Heater not hot what is the cause ?? 850

    Engine thermostat stuck open.








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    Heater not hot what is the cause ?? 850

    Replace the t-stat.








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      Heater not hot what is the cause ?? 850

      I replaced my thermostat myself with only a couple scary moments. Now I have heat to spare.
      If you replace it yourself, be careful threading the back bolt back in (it can get cross threaded easily) and it is a quick job.
      Someone posted a link to instructions but I seem to have misplaced it. if you need it, remind me to find it for you.
      ab







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