Question about 1998 Cadillac DeVille

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Running hot no heat

Running hot heat then no heat

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Coolant level is low or its leaking out. over heating cause can be thermostat not opening

Posted on Dec 02, 2012

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What could be wrong with my 2006 Honda Odyssey. It has no heat, but the engine is running hot. I thought maybe coolant level was low but overflow tank was right at max


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2002 dodge intrepid the heat blows but doesn't get hot! Had the thermostat replaced but still no heat. What would be the problem?


either a heat switch is not switching heat to the compartment or else the thermostat in the cooling system is defective. when it is not open it does not let hot water to the internal heating system, has your engine been overheating or running hot? also as this would be a symtom.

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2002 Honda Civic runs hot ONLY when the heat is on why is this?


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Radiator is either clogged,or it's bad. You could also check the heater core.

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Drained radiator added prestone Radiator flush refilled and started overheating, drained radiator replaced thermostat and now I get no heat from heater,Radiator water is hot


disconnect the heat hoses going into fire wall , put hose into one with pressure and flush as it sounds like it could be bloked in the heater core,the other thing that could be the problem be the hot ,cold switch as it restricts the flow to makes the heater hoter or colder , it might need tlc or replacing as it is manaul not elec

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1998 chevy blazer After the repair shop replaced the blown intake gasket, I have no heat from the heater. I took the heater hoses off and ran water thru the heater but still no heat


Is the vehicle running at normal temperature..If its running cooler than normal,then it might be the thermostat..Feel the upper radiator hose after the vehicle hot..It should be hot to touch

Sep 05, 2011 | 1998 Chevrolet Blazer

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1997 Camry 4-cyl fan works but heat very weak - coolant level ok


Probability 1) The thermostat is probably stuck open, coolant is not getting hot enough from the engine to provide heat.

Starting from cold, allow the engine to run and warm up. While doing this, feel the upper radiator hose - you should be able to feel the coolant heating up to the point the hose is uncomfortably hot. If it gets that hot, then go to next step.

Probability 2) The heater core flow is restricted, not allowing full flow of coolant into passenger compartment.

There are 2 smaller heater hoses that run to the firewall. Are either of these hoses getting hot? Both sides hot indicate full coolant flow. Both sides cool indicate heater control valve not opening fully.

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Is it just reading hot on the gauges or is running hot from under the hood.

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Did you replace the THERMOSTAT?? also make sure you get all the air out of system

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