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TSB 88-09-10 Insufficient Heat
Publication Date: APRIL 27, 1988

LIGHT TRUCK: 1987-88 F-SERIES, BRONCO

ISSUE: Insufficient heat inside of vehicles equipped with or without air conditioning may be caused by the heater air baffle missing from the plenum chamber. The heater air baffle prevents cold air from leaking in around the heater core.

ACTION: To correct this, check to see if the heater air baffle is present. If the heater air baffle is not present, install a heater air baffle using the following service procedure.

SERVICE PROCEDURE
1. Remove the heater core access cover to see if the heater air baffle is present. If missing proceed to Step 2.
NOTE: IF THE TEMPERATURE BLEND DOOR SHAFT CAN BE SEEN NEXT TO THE HEATER CORE, A HEATER AIR BAFFLE NEEDS TO BE INSTALLED.
2. Remove the heater core.
3. Remove the heater core face gasket.
4. Install the heater air baffle, (E7TZ-18D416-A) by inserting the pin on the bottom of the baffle into the lower surface of the plenum chamber.
5. Reinstall the heater core face gasket (or equivalent Frost King R930).
6. Reinstall the heater core.
7. Apply a bead of Ford Silicone Sealer, (D6AZ-19562-AA) around the heater core access cover.
8. Reinstall the heater core access cover.

PART NUMBER PART NAME
E7TZ-18D416-A Heater Air Baffle
D6AZ-19562-AA Ford Clear Silicone Sealer

SUPERSEDES: 88-04-14
WARRANTY STATUS: Eligible Under Basic Warranty Coverage

OPERATION DESCRIPTION TIME
880910A Inspect only 0.3 Hr.
880910B Inspect and install heater air baffle 0.6 Hr.

For other TSBs, check here.

See also:

. . .

Heater Hose Routing:
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