Good morning,
I would start by replacing the thermostat as the coolant may not be getting hot enough for heat at all times.
https://www.2carpros.com/articles/replace-thermostat
The other possibility is the heater core may be clogged. I would remove both hoses from the core under the hood and flush the core with a garden hose back and forth several times to get all the dirt and debris out of the core.
https://www.2carpros.com/articles/replace-heater-hoses
Roy
Removal
WARNING: Before beginning any service procedure, refer to Safety Warnings in General Information. Failure to follow this instruction may result in serious personal injury.
NOTICE: Use Motorcraft(R) Orange Antifreeze/Coolant. Do not mix coolant types. Mixing coolant types degrades the coolant corrosion protection and may damage the engine or cooling system.
NOTE: During normal vehicle operation, Motorcraft(R) Orange Antifreeze/Coolant may change color from orange to pink or light red. As long as the engine coolant is clear and uncontaminated, this color change does not indicate the engine coolant has degraded nor does it require the engine coolant to be drained, the system to be flushed, or the engine coolant to be replaced.
1. Drain the cooling system. Refer to Cooling System Draining, Filling and Bleeding .
2. Remove the ACL (Air Cleaner) outlet pipe. REFER to Fuel Delivery and Air Induction, Intake Air System Components - Exploded View .
3. Remove the 2 bolts and position the coolant inlet connection aside.
4. Remove the thermostat and the O-ring seal.
Discard the O-ring seal.
Installation
1. NOTICE: Use Motorcraft(R) Orange Antifreeze/Coolant. Do not mix coolant types. Mixing coolant types degrades the coolant corrosion protection and may damage the engine or cooling system.
Install a new O-ring seal and the thermostat.
Lubricate the O-ring seal with clean engine coolant.
2. Position the coolant inlet connector and install the 2 bolts.
10 Nm (89 lb-in).
3. Install the ACL (Air Cleaner) outlet pipe. REFER to Fuel Delivery and Air Induction, Intake Air System Components - Exploded View .
4. Fill and bleed the cooling system. Refer to Cooling System Draining, Filling and Bleeding
.
Filling and Bleeding
NOTICE: Use UVU550000 to fill the cooling system, then carry out the remaining steps to bleed all the air from the cooling system. Failure to follow these instructions can leave air in the cooling system which may damage the engine or cooling system.
NOTICE: The cooling system is filled with Motorcraft(R) Orange Antifreeze/Coolant. Always fill the cooling system with the manufacturer's specified coolant. If a non-specified coolant has been used the cooling system must be chemically flushed. REFER to Cooling System Flushing See: Cooling System > Procedures > Cooling System Flushing. Failure to follow these instructions may damage the engine or cooling system.
NOTICE: Use Motorcraft(R) Orange Antifreeze/Coolant. Do not mix coolant types. Mixing coolant types degrades the coolant corrosion protection and may damage the engine or cooling system.
NOTICE: Engine coolant provides boil protection, corrosion protection, freeze protection and cooling efficiency to the engine and cooling components. In order to obtain these protections, maintain the engine coolant at the correct concentration and fluid level in the degas bottle.
To maintain the integrity of the coolant and the cooling system:
Add Motorcraft(R) Orange Antifreeze/Coolant.
Do not mix with any other type of engine coolant. Mixing coolant may degrade the coolant's corrosion protection.
Do not add alcohol, methanol or brine, or any engine coolants mixed with alcohol or methanol antifreeze. These can cause engine damage from overheating or freezing.
Ford Motor Company does NOT recommend the use of recycled engine coolant in vehicles originally equipped with Motorcraft(R) Orange Antifreeze/Coolant since a Ford approved recycling process is not yet available.
NOTICE: Stop-leak pellets/products must not be used as an additive in this engine cooling system. The addition of stop-leak style pellets/products can clog or damage the cooling system resulting in degraded cooling system performance and/or failure.
1. Install UVU550000 and follow the manufacturer's instructions to fill the and bleed the cooling system.
When adding or topping off the engine coolant:
1. measure the coolant concentration in the vehicle using 300-ROB75240.
2. determine the concentration desired based on the vehicle duty cycle of extreme hot or cold operating conditions.
3. add/top off or adjust the coolant as follows:
for concentrations measured 48/52 to 50/50 (freeze protection -34° C to -37°C [-30° F to -34°F]), use Motorcraft(R) Orange Antifreeze/Coolant Prediluted to maintain a coolant concentration in this same range.
For all other concentrations, use Motorcraft(R) Orange Antifreeze/Coolant Concentrated and/or distilled water to get to the desired concentration.
4. When refilling the engine after a flush procedure, use a mixture of Motorcraft(R) Orange Antifreeze/Coolant Concentrated and distilled water to get to the desired concentration.
5. Recommended coolant concentration is 48/52 to 50/50 (freeze protection -34° C to -37°C [-30° F to -34°F]) engine coolant to distilled water.
6. For extremely cold climates less than -37° C (-34° F):
It may be necessary to increase the coolant concentration above 50%
NEVER increase the coolant concentration above 60%.
Maximum coolant concentration is 60/40 for cold weather areas.
A coolant concentration of 60% provides freeze protection down to -50° C (-58° F).
Engine coolant concentration above 60% decreases the overheat protection characteristics of the engine coolant and may damage the engine.
7. For extremely hot climates:
It is still necessary to maintain the coolant concentration above 40%.
NEVER decrease the coolant concentration below 40%.
Minimum coolant concentration is 40/60 for warm weather areas.
A coolant concentration of 40% provides freeze point protection down to -26° C (-15° F).
Engine coolant concentration below 40% decreases the corrosion and freeze protection characteristics of the engine coolant and may damage the engine.
8. Vehicle driven year-round in non-extreme climates should use a 48/52 to 50/50 (freeze protection -34° C to -37°C [-30° F to -34°F]) mixture of engine coolant and distilled water for optimum cooling system and engine protection.
2. Fill the degas bottle to 25 mm (1 in) above the COLD FILL line.
3. Install the degas bottle cap until at least 1 audible click is heard.
4. Turn the climate control system off.
5. Start the engine and increase the engine speed to 3,500 RPM and hold for 30 seconds.
6. Turn the engine off and wait for 1 minute to purge any large air pockets from the cooling system.
7. WARNING: Always allow the engine to cool before opening the cooling system. Do not unscrew the coolant pressure relief cap when the engine is operating or the cooling system is hot. The cooling system is under pressure; steam and hot liquid can come out forcefully when the cap is loosened slightly. Failure to follow these instructions may result in serious personal injury.
Check the engine coolant level in the degas bottle and if necessary fill to 25 mm (1 in) above the top of the COLD FILL line on the degas bottle if the engine is warm or to the top of the COLD FILL line if the engine is cold.
8. Start the engine and let it idle until the engine reaches normal operating temperature and the thermostat is fully open. a fully open thermostat is verified by the cooling fan cycling on at least once.
9. Increase the engine speed to 3,500 RPM and hold for 30 seconds.
10. Allow the engine to idle for 30 seconds.
11. Turn the engine off for 1 minute.
12. Repeat steps 9 through 11 a total of 10 times to remove any remaining air trapped in the system.
13. WARNING: Always allow the engine to cool before opening the cooling system. Do not unscrew the coolant pressure relief cap when the engine is operating or the cooling system is hot. The cooling system is under pressure; steam and hot liquid can come out forcefully when the cap is loosened slightly. Failure to follow these instructions may result in serious personal injury.
Check the engine coolant level in the degas bottle and if necessary fill to 25 mm (1 in) above the top of the COLD FILL line on the degas bottle if the engine is warm or to the top of the COLD FILL line if the engine is cold.
14. Install the degas bottle cap until at least 1 audible click is heard.
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Thursday, January 28th, 2021 AT 4:26 AM
