E 100 Van L6-300 4.9L VIN E 1-bbl (1982)
Evaporator Case: All Technical Service Bulletins
A/C - Condensate Leaks Into Passenger Compartment
Article No. 86-23-14
A/C CONDENSATE LEAKS INTO PASSENGER COMPARTMENT OR DISCHARGES FROM THE INSTRUMENT PANEL REGISTERS
LIGHT TRUCK 1975-87 ECONOLINE
Condensate may leak from the blower motor area or be expelled through the A/C registers during high temperature/high humidity conditions when the
system is operated in Norm A/C and high blower.
In these cases, condensate collects in the temperature blend door area and leaks out the seams of the blower case and/or becomes airborne and is
expelled through the A/C registers.
Check to assure that the evaporator housing has been sealed and the straight condensate drain tube has been installed as outlined in this article. Then,
procure and install a new venturi tube and deflector in the evaporator assembly using the following service procedure.
SERVICE PROCEDURE
A/C Condensate Leaks Into Passenger Compartment - Vehicles Built Prior To March, 1986
Due to improper condensate drainage, water can accumulate in the bottom of the temperature blend door frame assembly and spill into the blower
housing. If this condition occurs, insufficient sealing at the blower housing to evaporator housing flange and at the blower scroll cover to blower housing
may allow leakage into the passenger compartment from these areas.
An accumulation of water in the blower housing may result in water being blown through the register ducts and register outlets.
To correct the condition, one or more of the following service procedures should be initiated in the sequence listed. They are to be initiated on a
customer complaint basis.
NOTE:
Operation of the blower at a lower speed than Hi will allow accumulated condensate to drain out the drain tube. Therefore, operation of the
blower below HI where possible, or periodic reduction of the blower speed from HI, will significantly reduce moisture accumulation. Also,
when comfort will allow, operation of the air conditioner in MAX A/C rather than NORM A/C will reduce condensate accumulation by
reducing the humidity entering the vehicle.
Econoline Vehicles With (Production) Aspirator Drain Tube Built After March, 1984
