Question about 1996 Land Rover Discovery

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HEATER Does not get hot only slightly warm Recently solved a overheating problem(Blocked RAD) Part of diagnostic was to remove Thermostat, this as replaced later I am assuming there is now air in the system. I have beld TOP by removing the hexagonal plug TOP of RAD running engine and topping up coolant. All TOP hoses feel hot, I have never worked on heater hoses dont know where they are or how to bleed them, I cannot get a hose pipe to back fill them as I live in First floor apartment and dont know if they are HOT as I dont know where they actualy are. Confident it is not Heaer Matrix as prior to overheating prob heater worked find and even now cold sie makes heater really cold and HOT side makes it slightly warm so heater working. Is it likely it is the new Thermostat? This is a PIG of a job on this engine to replace but if needs must. Think I have covered all bases here. Thanks Stuart

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I have the same problem after new head gasket all blead engine up to temp but not very warm heater any ideas

Posted on Dec 17, 2009

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Ok. Here goes. 1. Start by making sure your thermostat is the correct one and that means the manufacturer suggested temp must be right. 2. You said the radiator is not stopped up. Good, or you should be overheating which will destroy motor. 3. Both top and bottom radiator hoses should get hot when stat opens and water pump circulates water. 4. Heater hoses can be removed and backflushed to check for circulation. 5. check inside valves for opening closing heater core. Some are mechanical and some are electronic that open and close off the heater core. 6. If your head gasket is blown or heads are warped due to excessive abuse or age of vehicle then you will have to decide to fix (not good idea on aluminum motors) or replace the motor or the car. 7. Had a relative who died of cancer and had me replace his stat two times thinking this would give him more heat in the car but the cancer is what caused his body temp to stay cold. Hope you do not have cancer.

Posted on Aug 12, 2010

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