2002 E450 A/C Vacuum Loss
As in title, 2002 E450 under Class C. A/C blows out of Defrost Vents Only. Vehicles are set up to use the Defrost Vents IF Vacuum or the Mode Selector fails. I've found I have vacuum where the l...
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FIXED!
I bought a spherical vacuum canister (looks like the Acme anti-Roadrunner bomb ordered by Wiley Coyote) and a two-port vacuum check valve (both in Dorman products HELP line) from local Advance Auto Parts. O'Reilly, NAPA, Amazon all have equivalents.
Found a spot underhood behind the air filter assembly. I could get to the area by removing the filter housing and element ONLY. No need to pull anything else. There were two brackets hanging down. Nothing attached, holes ready for 1/4" bolts. Mounted one end to one bracket and made a strapping iron strip to reach the other end.
This pic shows the canister installed, behind the filter
Here's the connection to the vacuum line from the intake manifold, along with the new check valve. Intake manifold line is RED. All the rest of vacuum source to the controls are BLACK. One line out of the valve goes to the Canister, the other to the bypass line I ran into the cockpit
SO!!! Verify Source Vacuum First! Anybody needing help, send'em to me.
I bought a spherical vacuum canister (looks like the Acme anti-Roadrunner bomb ordered by Wiley Coyote) and a two-port vacuum check valve (both in Dorman products HELP line) from local Advance Auto Parts. O'Reilly, NAPA, Amazon all have equivalents.
Found a spot underhood behind the air filter assembly. I could get to the area by removing the filter housing and element ONLY. No need to pull anything else. There were two brackets hanging down. Nothing attached, holes ready for 1/4" bolts. Mounted one end to one bracket and made a strapping iron strip to reach the other end.
This pic shows the canister installed, behind the filter
Here's the connection to the vacuum line from the intake manifold, along with the new check valve. Intake manifold line is RED. All the rest of vacuum source to the controls are BLACK. One line out of the valve goes to the Canister, the other to the bypass line I ran into the cockpit
SO!!! Verify Source Vacuum First! Anybody needing help, send'em to me.
