No heat, the drivers side heater hose has a tee going to vacuum, is this a vacuum valve? And might be bad?
have the same problem?
Sunday, August 14th, 2016 AT 10:40 AM
TEST B: INSUFFICIENT, ERRATIC OR NO HEAT
1. Check For Proper Engine Coolant Level
Turn ignition OFF. Check engine coolant level hot and cold. If coolant is at proper level,
go to next step. If coolant level is incorrect, go to step 3) .
2. Check For Hot Coolant To Heater Core
Start and run engine to normal operating temperature. Feel heater core inlet tube. If
tube is too hot to handle, go to step 4) . If tube is not hot, service cooling system. Turn
3. Check Cooling System For Leaks
Be sure cooling system is filled to specified level. Perform cooling system pressure
check. If system holds pressure, go to next step. If system does not hold pressure,
pressure test heater core.
4. Check Heater Core Outlet Hose For Hot Water
Start and run engine to normal operating temperature. Feel heater core outlet tube. If
core tube is warm or hot, go to TEST E . If core tube is not warm or hot, test for plugged
or restricted heater core.
1999 Ford Escort 2.0L Eng LX
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Monday, August 15th, 2016 AT 4:09 PM
Some systems do have a heat control valve, if you have a vacuum tester test it. Or go to Parts store, they rent the tester out for free.