What is it?

[what next]

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.

["007"]

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.

[tom chelbana]

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.
Newmar Man

[what next]

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.

[Skip426]

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.