Fleetwood FWD V8-252 4.1L (1986)
Evaporator Case: All Technical Service Bulletins
A/C System - Odors
Bulletin No. T
87-137
File in Group
1
Number
39
Corp. Ref. No.
711208
Date
July '87
SUBJECT:
A/C ODOR
MODELS AFFECTED: 1985-1987 FWD DE VILLE AND FLEETWOOD 1986-1987 ELDORADO AND SEVILLE 1987 ALLANTE
Some 1985-1987 FWD De Villes/Fleetwoods, 1986-1987 Eldorados/Sevilles, and 1987 Allantes may experience odors emitted from the air conditioning
system during various operating conditions. Odor may be the result of debris in the heater/evaporator case or mold/bacteria growth on the evaporator
core. To repair this condition, the following procedure should be utilized.
1.
Remove power module as described in Service Manual.
CAUTION: Power module heat sink may be hot.
2.
Check heater/evaporator case for debris. Remove any debris present through power module opening.
3.
Use Kent-Moore tool J36645 or an equivalent siphon-type parts cleaning spray gun capable of delivering two ounces/minute of liquid when driven
with shop air at 80-90 PSI. Insert the nozzle of the spray gun through the power module opening, and insert the siphon hose into container of
disinfectant* such as Clorox or equivalent.
CAUTION: Wear safety goggles. Do not get disinfectant in eyes or on clothing. Disinfectant is harmful if swallowed and may irritate skin.
Direct spray toward evaporator face to ensure adequate coverage of the corners and edges, completely saturating the entire core. Use one quart of
disinfectant.
4.
Check underneath vehicle to verify proper evaporator drain operation. If necessary, unclog and increase drain plug slits with a razor blade or sharp
knife.
5.
Allow the core to soak for approximately five minutes.
6.
Thoroughly rinse the evaporator core with one quart of clean water using the spray gun to remove any disinfectant residue.
7.
Reinstall the power module.
CAUTION: Power module heat sink may be hot.
*
In September, 1987 an air conditioning system disinfectant will be available through
GMSPO to be used with this cleaning procedure.
For warranty purposes, use Labor Operation T6235 for 1.1 hour. If debris needs to be removed from heater/evaporator case, use ADD time of .1 hour. If
evaporator case drain needs to be unclogged, use ADD time of .2 hour.
