My engine is leaking water behind the thermostat and around the water pump..the water pump is new...what can i do?

You don't say what make and model you have, but on many engines now, the water pump is behind the timing cover which is the same cover behind the serpentine pulleys. So it is probable your water pump is leaking in there, and coolant escaping from behind the cover. It is not usually economic to overhaul the pump itself.

If your engine has a timing belt, I'd advise changing that too as it has to come off.

Because the heater is getting cold, that indicates low coolant. It leaked out and the leak needs fixing, but as soon as the engine cools off, refill the coolant and keep it full. Never add coolant to a hot engine without the engine running. Your electric fan might not be working. The fan moved air through the radiator and air circulated the same way when the car is moving. Check that.

If you can see your water pump, feel around the neck of it for moisture. Any moisture there means the pump leaks and needs replacing. Some cars have the water pump behind the cam belt. You can't get to it without a lot of hard work- get that done by a qualified mechanic if you can't find your leak elsewhere, such as a leaking hose or bad radiator cap.

If your electric fan doesn't work, that might be the whole problem. Usually the fan relay fails before the actual fan. Replacing the relay will solve the problem if that's it. Good luck. China OBD2 car diagnostic tools wholesale on CareUCar

overheating sound like faulty thermostat.thermostat either sticking close or could have blown headgasket if you see a lot of white smoke coming out of exhaust.if headgasket is leaking check engine oil should look milky.also check water pump look around weep hole or see coolant leaking around water pump replace water pump.also check water pump drive belt.make sure drive belt not loose slipping.

could leak water pump that what you did.

You have a couple of different problems here. You need to address the leak issue first. If you took it to a shop, go back and tell them to fix their work. Your radiator fan is another issue. Is this fan the big one you normally see on engines or are you talking about the auxiliary cooling fan that is mounted in its own assembly right behind the radiator? The auxiliary fan is controlled by a temperature sensor that your car's computer operates. For a better explanation, see the following link:

https://www.2carpros.com/articles/how-an-electric-cooling-fan-works

More than likely, the shop that did your work did something wrong and they are required to fix their screw up. At a minimum, they should warranty their work for at least 90 days.

well first i would check all the water hoses in the engine compartment for cracks and leaks then check around the radiater for leaks if you don't see any water leaking from the hoses or the radiater then try to see if you see water coming from the water pump behind the cooling fan if the water is leaking from behind the cooling fan then it is most likely your water pump

You didn't mention the model, year and engine. If this is a V6 or V8 then suspect a leaking intake manifold gasket.

CHECK AROUND WATER PUMP AREA.AND THERMOSTAT HOUSING FOR LEAKS.THE MECHANIC WHO PUT THE WATER PUMP ON MAY FORGOT TO PUT SEALANT ON BOTH SIDES OF THE WATER PUMP GASKET CAUSING LEAKS.LOOK AROUND THERMOSTAT HOUSING FOR LEAKING.IF THERMOSTAT SEAL WAS DAMAGE DURING INSTALLATION IT WILL CAUSE LEAKING.IF ALL LOOKS GOOD CHECK FOR COOLANT LEAKS AROUND RADIATOR .CHECK RADIATOR TOP AND BOTTOM HOSES FOR LEAKS AND CHECK HEATER PIPES AND HEATER CORES HOSES FOR LEAKS.IF ALL HOSES GOOD.CHECK FOR LEAKING CORE PLUGS.

More than likely the water pump seal has failed. You will have to replace the waterpump to get this fixed. It takes quite a while for water to start circulating due to the thermostat which blocks water from flowing into the radiator when it is still cold (less than 90deg celsius). Due to the overheating the thermostat may also have been damaged and stuck in the closed position. It is not expensive so have it replaced along with the waterpump to be safe. A cracked head will not leak water outside the engine. (In 25 years I've not seen this once)

If it is not coming out of any hose connection, and it is in the middle front area...it is most likely the water pump. You may be able to get a look at the pump, which is run by the timing belt. The pump mounts behind its rear cover unfortunately. Some water pumps have a small hole that you can check for water leaking out to indicate it is bad. If not, you will have to remove the timing belt rear cover to check the water pump gasket area for water leaks.
A head gasket is not likely unless you find water in your oil.
Good Luck!