Not the motor, but the wash contains detergent that is not good in the coolant fluids. You should drain and flush the coolant system and replace it with water and antifreeze mixed to the recommended proportions.
Do this as soon as possible, if you have indeed used screen wash instead of antifreeze by mistake.
Standard R-134a coolant will damage an R-22 coolant system because they are chemically different. They also have different characteristics for pressure and freezing point.
I don't know the reaction it would have on the coolant but I would advise you to flush out your system immediately and put in fresh coolant.
Spray Lysol into the fresh air vent near the bottom of your windshield. This will kill the mildew.
Your engine can lock up if there's no water in the system.
Probably no damage, especially if you only filled the reservoir with it and not the whole cooling system. Use a turkey baster and suck up what's in the reservoir, dispose of properly. Then refill with coolant. I'm really not sure if the washer fluid will screw with the various rust inhibitors or lubricants key to the coolant. If you're really concerned, just flush the coolant and refill the system.
There will be air trapped in the system. The car may overheat and boil the coolant, causing damage.
The coolant level sensor in the coolant reservoir detects the coolant level is low. The coolant system must have a leak in it somewhere. Have a trusted mechanic diagnose it soon before you do damage to the engine.
Do not run the engine with windshield washer fluid in the cooling system. Most washer fluids contain methane alcohol and is not the same kind of chemical found in coolant. I strongly recommend thoroughly flushing the system and using new coolant. It may be wise to exchange the thermostat. The problem with a foreign chemical circulating the system is manifold and head gaskets could be damaged and if you are unable to replace these seals it can cost thousands of dollars.
You have a leak in the cooling system. If you don't see evidence of coolant leaking on the ground, you probably have a head gasket problem. Have the system pressure tested soon before more serious damage is done.
It's alright as long as the temperature of the air outside does not fall below freezing. Most cars have a 50/50 mix of antifreeze/water anyways. If the temperature does fall below freezing and all you have in the coolant system is water, it will cause a lot of damage to the engine and coolant system (it will freeze and expand, tearing hoses and could potentially damage internal components of your engine, such as the head gasket).
well you could just turn the heater off heater blower ---- If it is a car heater then check your coolant level. the heater is driven off a heat converter that is fed by the radiator system. When the coolant fails to pump round the radiator system the car internal heater doesn't work. Driving without coolant in the system will result in the engine overheating and seizing.
I would recommend you drain it out, flush the system, and install the correct green coolant that Ford recommends. Using the wrong coolant can damage parts.