yo REV,
You'll need a slide hammer as Jeff shows; ask local parts store for a Loan a Tool; such as what Auto Zone has; refundable security deposit may be reduced bec. of your sacrifices and value to the community
•Insufficient, Erratic, or No Heat
•Low radiator coolant due to coolant leaks.
•CHECK radiator cap pressure. REPLACE if below minimum pressure. FILL to specified coolant level. PRESSURE TEST for engine cooling system and heating system leaks. SERVICE as required.
•Engine overheating.
•REMOVE bugs, leaves, etc. from radiator and support or A/C condenser core fins. CHECK for:Operation of engine fan clutchLoose drive beltSticking thermostatIncorrect ignition timingWater pump impeller damageRestricted cooling system
SERVICE as required.
•Loose drive belt.
•REPLACE drive belt if cracked or worn and ADJUST drive belt tension.
•Thermostat.
•FEEL heater water hoses. If the heater water hoses are too hot to hold, the thermostat is OK. If the heater water hoses do not get too hot to hold, REPLACE the thermostat. If only one heater water hose gets hot while the other remains cool, a plugged heater water hose or heater core is indicated.
•Heater water hoses.
•CHECK condition and routing of hoses.
A1 CHECK ENGINE COOLANT LEVEL
•Allow engine cooling system to fully cool and check radiator coolant level.
Is coolant level low?
•Visually inspect condition of heater water hoses for pinched or collapsed conditions
A4 TEST THERMOSTAT
•Start vehicle and allow to run for 10 minutes.
•Feel the heater water hoses and the underside of the upper radiator hose.
Are the heater water hoses and the upper radiator hose cool?
Yes REPLACE thermostat. RETEST system.
No go to A5
A5 CHECK TEMPERATURE CONTROL DOOR OPERATION
•Rotate temperature control **** from full warm to full cool and check temperature door (aka Blend Door) for operation. Door is cable operated from HVAC Control Panel.
Blend Door Location in a 94; 80-96 similar; "...Probably the temp blend door is loose & flopping around on its own. The easiest way to see it is to fully lower the glove box, pull the ~8 screws from the heater core cover, & look inside to the L (driver's side). You'll see the cable & control lever (in top L of 2nd pic) as soon as you fold the glovebox down, so inspect it first. The 3rd shows the whole cover - it's the large section in the top center with tiny white numbers inked near its bottom edge. The cables are visible, too...."
The module I MISlabelled as "Airbag" is actually the Wiper Control Module (WCM). The Airbag Diagnostic Module (ADM) is light blue, wrapped in black foam, above the gas pedal.
Source: by Steve
you can take out your glove box, it will make it much easier. If not, you can probably feel around and find it. Just above the box housing the heater core you should find a clamp that holds the other end of the cable from your heater controls. Follow that about an inch or three towards the driver's side until you feel a lever. This controls the little door that bypasses the heater. Just move that lever/door and you should be running heat...."
Source: by darb
Does temperature door operate correctly?
Yes CHECK for head gasket leaks.
No CHECK for binding, damaged or disconnected temperature door. REPAIR or REPLACE as necessary. RETEST system
You'll need a slide hammer as Jeff shows; ask local parts store for a Loan a Tool; such as what Auto Zone has; refundable security deposit may be reduced bec. of your sacrifices and value to the community
•Insufficient, Erratic, or No Heat
•Low radiator coolant due to coolant leaks.
•CHECK radiator cap pressure. REPLACE if below minimum pressure. FILL to specified coolant level. PRESSURE TEST for engine cooling system and heating system leaks. SERVICE as required.
•Engine overheating.
•REMOVE bugs, leaves, etc. from radiator and support or A/C condenser core fins. CHECK for:Operation of engine fan clutchLoose drive beltSticking thermostatIncorrect ignition timingWater pump impeller damageRestricted cooling system
SERVICE as required.•Loose drive belt.
•REPLACE drive belt if cracked or worn and ADJUST drive belt tension.
•Thermostat.
•FEEL heater water hoses. If the heater water hoses are too hot to hold, the thermostat is OK. If the heater water hoses do not get too hot to hold, REPLACE the thermostat. If only one heater water hose gets hot while the other remains cool, a plugged heater water hose or heater core is indicated.
•Heater water hoses.
•CHECK condition and routing of hoses.
A1 CHECK ENGINE COOLANT LEVEL
•Allow engine cooling system to fully cool and check radiator coolant level.
Is coolant level low?
•Visually inspect condition of heater water hoses for pinched or collapsed conditions
A4 TEST THERMOSTAT
•Start vehicle and allow to run for 10 minutes.
•Feel the heater water hoses and the underside of the upper radiator hose.
Are the heater water hoses and the upper radiator hose cool?
Yes REPLACE thermostat. RETEST system.
No go to A5
A5 CHECK TEMPERATURE CONTROL DOOR OPERATION
•Rotate temperature control **** from full warm to full cool and check temperature door (aka Blend Door) for operation. Door is cable operated from HVAC Control Panel.
Blend Door Location in a 94; 80-96 similar; "...Probably the temp blend door is loose & flopping around on its own. The easiest way to see it is to fully lower the glove box, pull the ~8 screws from the heater core cover, & look inside to the L (driver's side). You'll see the cable & control lever (in top L of 2nd pic) as soon as you fold the glovebox down, so inspect it first. The 3rd shows the whole cover - it's the large section in the top center with tiny white numbers inked near its bottom edge. The cables are visible, too...."
The module I MISlabelled as "Airbag" is actually the Wiper Control Module (WCM). The Airbag Diagnostic Module (ADM) is light blue, wrapped in black foam, above the gas pedal.
Source: by Steve
you can take out your glove box, it will make it much easier. If not, you can probably feel around and find it. Just above the box housing the heater core you should find a clamp that holds the other end of the cable from your heater controls. Follow that about an inch or three towards the driver's side until you feel a lever. This controls the little door that bypasses the heater. Just move that lever/door and you should be running heat...."
Source: by darb
Does temperature door operate correctly?
Yes CHECK for head gasket leaks.
No CHECK for binding, damaged or disconnected temperature door. REPAIR or REPLACE as necessary. RETEST system
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