Heat

Tiny
JIMNULOOK
  • MEMBER
  • 1996 FORD E-SERIES VAN
  • V8
  • 2WD
  • AUTOMATIC
  • 78,000 MILES
1996 ford e150, 5.8 very little heat and at times blows cold. New thermostat, new heater control valve. Clean anti-freeze.
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Thursday, December 23rd, 2010 AT 5:42 PM

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Tiny
FIXITMR
  • MEMBER
If possible check hoses to and from core for being hot when engine is warmed up. Shut off engine if necessary to try and get to hoses. If both hot then problem most likely in vent door system.
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Friday, December 24th, 2010 AT 12:52 AM
Tiny
KHLOW2008
  • EXPERT
INSUFFICIENT HEAT
Ensure cooling system is operating properly.
Check heater system hoses and core for coolant flow.
Check for loose or misaligned cable to temperature blend door.

FUNCTION SELECTOR VALVE

1. Start engine. Run at idle to maintain a constant vacuum supply. Slide function selector lever slowly from one position to another. A momentary hiss, indicating vacuum is supplied to function selector assembly, should be heard.

2. If hiss is not heard, check for kinked, pinched or broken vacuum hose. Inspect for faulty check valve between manifold and reservoir. A continuous hiss indicates a major leak in system, but does not necessarily indicate a leak at function selector assembly.

3. If constant hiss is heard, cycle function selector with blower motor on HI speed and check location of discharged air. Airflow schematic and vacuum control chart indicate which vacuum motors are operated for each function selector lever position. See Fig. 5. If
discharge airflow does not agree with chart, repair or replace components.

4. Check and operate vacuum motors using hand-held vacuum pump. If motor operation is satisfactory, vacuum hoses are probably pinched, kinked, disconnected or punctured.
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Saturday, December 25th, 2010 AT 10:27 AM

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