95 conversion van ac blows in front but warm air blows out rear vents why? on 1995 Ford E-150

when van is pulling the air flow in front changes from front vents to defrost vents.Have checked rear fuses at loss help.

by in Piedmont, SC on September 03, 2012
1 answer 2 comments
ANSWER by on September 03, 2012
REAR UNIT HAS BLOCKAGE PROB. EXPANSION VALVE IS WHY IT BLOWS WARM AIR. VACUUM LEAK PROB. UNDER HOOD IN SMALL VAC. TUBE OR CHAMBER IS WHY SWITCHING VENT TO DEFROST. SEE MECHANIC.
COMMENT by on September 03, 2012
what could have caused the blockaged? This happened about 3 mo. ago. Is there someway I can check without going to mechanic am on a fixed income. Thank You very much.I will show this to my son and check this out.
COMMENT by on September 03, 2012
AN INLINE FILTER IS AVAIL. AT NAPA OR POSS. OTHER PARTS STORES. HAD TO PUT ONE IN MY CHEVY. AFTER CLEANING IT 2 TIMES I GOT TIRED OF THAT, THE FILTER WORKED FOR ME. AS FOR YOUR VACUUM LEAK LOOK FOR SMALL PLASTIC TO RUBBER HOSE GOING INSIDE THROUGH FIREWALL. IT IS PROB. BROKEN OR UNHOOKED.