A/C System - Chemical/Refrigerator Type Odor
91ford22
Article No.
91-15-5
07/24/91
AIR CONDITIONING - "REFRIGERATOR TYPE SMELL" OR "CHEMICAL TYPE ODOR" A/C SYSTEM - VEHICLES BUILT BEFORE 10/15/90
FORD: 1980-91 CROWN VICTORIA
1981-91 ESCORT
1982-83 FAIRMONT
1982-88 EXP
1982-91 MUSTANG, THUNDERBIRD
1983-86 LTD
1984-91 TEMPO
1986-91 TAURUS
1989-91 PROBE
LINCOLN-MERCURY: 1980-91 GRAND MARQUIS, MARK VII, TOWN CAR
1981-87 LYNX
1982-83 LN7, ZEPHYR
1982-86 CAPRI
1982-91 CONTINENTAL, COUGAR
1983-86 MARQUIS
1984-91 TOPAZ
1986-91 SABLE
LIGHT TRUCK: 1980-91 BRONCO, F-150-350 SERIES
1982-91 RANGER
1983-90 BRONCO II
1986-91 AEROSTAR
1988-91 ECONOLINE, F SUPER DUTY, F-47
1991 EXPLORER
This TSB article is being republished in its entirety to include Labor Standards for the Taurus, Sable and Probe vehicle models.
ISSUE: A "refrigerator type smell" or "chemical type" odor may come from some A/C systems. As the calibration of the clutch cycling pressure switch drifts downward, the evaporator core temperature may drop too low. This results in a "refrigerator type smell" or "chemical type" odor as the system cycles on and off.
Figure 1:
ACTION: Install a new recalibrated clutch cycling pressure switch or adjust the existing/non-recalibrated clutch cycling pressure switch. The recalibrated switch can be identified by a specific supplier date code stamped near the fitting end of the switch, Figure 1.
^ Recalibrated switches built in the 1990 calendar year begin with the supplier date code 9041 and run through 9052.
^ Recalibrated switches built in the 1991 calendar year start with the supplier date code 9101 and run through 9152.
ADJUSTMENT PROCEDURE
Adjust the existing/non-recalibrated A/C cycling pressure switch by using the following service procedure.
1. Disconnect the body wiring harness.
2. Turn the set screw located between the two electrical terminals 3/4 turn clockwise (looking into the electrical connection) Figure 1.
3. Reconnect the body wiring harness.
PART NUMBER PART NAME CLASS
E35Y-19E561-A A/C Cycling Pressure Switch AM
OTHER APPLICABLE ARTICLES: NONE
SUPERSEDES: 91-11-8
WARRANTY STATUS: Eligible Under Basic Warranty Coverage
OPERATION DESCRIPTION TIME
911505A Install A/C Cycling 0.3 Hr.
Pressure Switch - Town
Car, Escort, Lynx, EXP And
LN7.
911505B Install A/C Cycling 0.4 Hr.
Pressure Switch - Tempo/
Topaz, Taurus/Sable, Probe.
911505C Install A/C Cycling 0.5 Hr.
Pressure Switch - Crown
Victoria, Grand Marquis,
Mark VII, Continental,
Thunderbird, Cougar,
Fairmont, Zephyr, Mustang,
Capri, LTD And Marquis.
911505D Install A/C Cycling 0.4 Hr.
Pressure Switch - All Light
Trucks.
911505E Adjust A/C Cycling Switch - 0.2 Hr.
All
DEALER CODING
BASIC PART NO. CONDITION CODE
19E661 53
OASIS CODES: 208000, 208999