I have a 1997 cadillac deville and it keep over heating. i have changed the hose out twice and checked for leaks, plus i my fan is working fine...

Sounds like you covered everything.
The fans come on at 220 degrees but the engine continues to get hotter ? Have you tried running the engine with the thermostat out to check for flow and blockages ?

Check that two fans are turning on when you turn the a/c on or when it gets to 222 deg. F according to the gauge, and shuts off when it gets down to 212 deg. F.

May have a problem with relays, wiring contacts at the relays, fuse, or the relays themselves. Also, the fans on Cadillac Devilles from 1997 have multiple speeds depending on demand for cooling.

In summary, I would check fans.

check all hoses going to water pump and make sure they are not leaking, if hoses are not leaking then pump is going out. need to replace asap, if car has northstar engine DO NOT GET IT HOT average cost to replace head gasket on northstar is $2300.00 plus

These engines are know for leaking head gaskets. A good quick test for this is fill the coolant tank to the top with the cap off. Start the engine. If the the coolant blows out of the tank, you have a head gasket leak.

Overheating can be numerous things: Fans not working, water pump, thermostat, overflow cap, and the list keeps going. When the engine is running and heats ups, feel the heat of the top hose, if the hose isn't hot, the thermostat is most likely stuck open and needs replaced. If it is hot we know you have circulation. The cap on the expansion tank may be defective, if it can't hold the pressure of the water, it will release at the overflow cap if the cap is bad. Also check the coolant level.

are both fans running/working u have a fan for the vehicle it self and for ac/heat check to make sure ur fans r both working

Check the radiator, hoses, and water pump for leaks. If you don't see any coolant loss, the problem is most likely a faulty thermostat. Hope this helped and best wishes.

To try to find the leak, purchase a spray can of engine cleaner and spray the entire area of the pump and hoses. Then wash off with a garden hose. Fill pump reservoir with fluid. Have someone turn the steering wheel while you look in that area of the pump and hoses with a flashlight for the leak. Be careful of rotating fan and belts!

I would beleive more that you have build up in the heater core. Try taking loose the heater hoses from the block and use a water hose to spray into one of the hoses letting it come out the other hose then switch hoses with the water hose and keep reverseing for 2/3 times each hose. sounds like stop leak may have been used in a prior time and may be blocking water flow.

Good luck,
Lugnut61

car keep running hot