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Old 04-16-2019, 04:09 PM   #8
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Join Date: Jan 2014
Location: egg harbor twp nj
Posts: 247
Default Re: heater control valve

there's a simple manual shut off valve available at most parts stores for about $10- just open in winter and close in summer. Actually with the slide control on my 51 the air flow is diverted from the heater core unless it's in the heat position, so no need for a shutoff valve.
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