2000 E350, only defrost vents work
Thanks in advance for any help or thoughts. Situation, AC works, heat works, but they will only blow through defrost vents, will not change to dash or floor vents. Anyone have a similar issue? a...
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@Home Skillet... I wonder if Ford rearranged things a little. On ours, the connector to the RED tube from the engine, on to the BLACK that disappears into the HVAC cabinet, is between Battery and Air Filter, close to Oil Filler Cap. Then black disappears into HVAC not far to the passenger side from there.
It's VERY likely to NOT be the Control Head in the Dash. I wasted DAYS getting in there and found Zero Vaccuum feeding it. That's why I suggest simply cutting the black tube where I pictured.
The Very Least it Needs is Engine Vacuum to the Control Head. Some have simply found the source and then run vacuum hose to a place feeding the Head. It'll work maybe 80-pct of the time. It'll fall back to Defrost accelerating or climbing. A Check Valve will probably keep it where you've set it, as long as you're driving. If you want full function, settings holding and ability to change modes under all driving conditions, then a Reservoir too.
To repair it, you need Hose (maybe connectors) like StripIt got, then a Check Valve and a Vacuum Tank. Most auto supply stores have a spherical one. Of those, one has built-in check valve, the other does not. I chose NOT. Wanted to be able to test and replace each one individually. That paid off. Check valve failed once, and the Tank is in a harder place to get to than the Valve is.
It's VERY likely to NOT be the Control Head in the Dash. I wasted DAYS getting in there and found Zero Vaccuum feeding it. That's why I suggest simply cutting the black tube where I pictured.
The Very Least it Needs is Engine Vacuum to the Control Head. Some have simply found the source and then run vacuum hose to a place feeding the Head. It'll work maybe 80-pct of the time. It'll fall back to Defrost accelerating or climbing. A Check Valve will probably keep it where you've set it, as long as you're driving. If you want full function, settings holding and ability to change modes under all driving conditions, then a Reservoir too.
To repair it, you need Hose (maybe connectors) like StripIt got, then a Check Valve and a Vacuum Tank. Most auto supply stores have a spherical one. Of those, one has built-in check valve, the other does not. I chose NOT. Wanted to be able to test and replace each one individually. That paid off. Check valve failed once, and the Tank is in a harder place to get to than the Valve is.
