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Old 12-03-2019, 02:01 PM   #1
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What is it?

I have a small leak from this thing. I think, for reference it is 2010 Spartan frame, it is on left side by heater box. I think it came out of white tube. I can't find any tube to go to it. At first I thought I had a heater hose leak but then it seem to come from above, the white tube. The fluid was a small amount I thought anti freeze. Maybe jack fluid or trans. I wish I had paid more attention when wiping it up. Click image for larger version

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Old 12-03-2019, 02:24 PM   #2
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If its up front near the EVAN's AC/Heater unit its for water of evaporator when it defrosts, usually its longer so will not drip on your GEN HOUSING.
You can find EVAN's info in this link.
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Old 12-03-2019, 02:28 PM   #3
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Looks like a vacuum control valve for heating and AC. Could be antifreeze from heater core leaking. Might check and see if there is any other fluid in that area.
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Old 12-05-2019, 10:45 AM   #4
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The item in question is a vacuum pump, it provides the vacuum for heater door mode setting. Still looking for my leak , it may be coming from temperature control valve on heater hose. It sit directly above , I noticed one drop on bottom of it this morning. Did add about 8oz anti freeze to system , but it has been long time since last add.
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Old 12-05-2019, 11:01 AM   #5
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I had to replace the Evans/Tempcon , " electronic ranco " (heater water flow ) control valve , 2 years ago for a leak problem .
On mine there was an up dated valve that required replacing the wiring back to the dash control head , instructions with the new part and wiring were great for the install.
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