Warninglight, next to "hot" and "cold" on left hand siide of dashsboard display. Orange rectangular box with 3 "wavy lines" extending from bottom to top ofbox with an arrow on top of each line.

Owners manual/ford forum

Sounds like possibly the blend door is broken inside the heater box, I would double check and make sure the coolant level is full, if it is I would take the actuator off on the blend door and try and move it by hand and see if it changes

Had same problem on my 04 Suburban. Dealer's service dept said the passenger side temp sensor was defective causing the driver side actuator to continuously search. They replace the sensor about 2 months ago and A/C has been working fine ever since. Repair bill was $400+.

That would be the low coolant light. With the engine cold remove the coolant reservoir cap and add coolant until the level reaches the full mark.

If the cooling system has never been serviced you should use a "dexcool" extended life coolant mixed 50/50 with water.

If the cooling system has been serviced it is possible that it has regular green coolant in it.

The extended life coolant and green coolant should not be mixed.

once the coolant is topped off the light may remain on. It is common for the sensor to get stuck. Sometimes lightly tapping on the reservoir with a rubber mallet is necessary to get it unstuck.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

That would be the low coolant light. Check the coolant reservoir with the engine cold. If the coolant is red or orange add "dexcool" extended life coolant. If the coolant is green than adding the regular green coolant is fine. The two different coolants should not be mixed.

Have you noticed any puddles under the car?

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

If it blew cold air after freon added and 5 days later blew warm, you may have a leak in the system. Also check and see if compressor comes on if not you may have an electrical issue, relay for compressor,coil on compressor, etc.......

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hi off your discription sounds like the engine warning light is your car running ok and have you not got the drivers hand book in the glove compartment as this will verify it the engine waring light is basicly for the emmissions on your car you need to get a fault code reading to give you some idea of what if causing your problem it may be a simple fix example blocked air cleaner but i find guessing usually costs you more money in the long run i wouldn,t ignore it though as they are there for a reason yates210456

That light indicates you are low on coolant. Make sure the engine is completly cold and remove your radiator cap, fill to top with new coolant, also fill reserve bottle to cold line.

Hope this helps