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If you change the thermostat and the heater core and the rad cap holds pressure why does it still blow cold air?
There probably are several possible causes, and I will provide those which I can recall. In order for the heater core to heat the air passing through it, there must be HOT water [engine coolant] FLOWING THROUGH the core. Obviously, in spite of the replacement parts you installed, something MUST BE preventing that flow of hot water. Most, if not all, vehicle heating systems which use engine coolant as the source of heat, have a control valve [linked to the heater controls on the dash] which "turns off" the coolant flow when the control is off, and vice versa. If THAT valve is in the off position, hot coolant CANNOT flow to the heater core. Possible causes for that failure of coolant flow could include: 1) The control VALVE is "frozen" (stuck), in the CLOSED POSITION. This could be caused by corrosion, or a broken or disconnected control cable linkage. 2) Some kind of BLOCKAGE ANYWHERE in the system. This could be in any of the hoses, or in the the connector "elbows" to the engine, or some other point in the engine cooling system. 3)Unless you have had the vehicle since it was new, a previous owner may have installed an extra, inline cutoff valve somewhere in the system, in order to fully shut it down during the heat of summer. If such a valve exists, it could be in the closed position. In addition to the above good answer, the thermostat may be installed upside down. Spring goes toward the engine block. ______answer---- All of the above are good answers, on my 92 Corsica there is a heater door controlled by a vac switch. If the switch is bad it will not allow heated air to the cars interior, it's unusual but there is no inline valve on the heater hose it's self.
What else can I help you with?
Why does the heater in a 1986 Cadillac ElDorado blow cold air when there is good circulation?
You need to clean or change your heater core Also check your rad cap to be sure that it holds the pressure change it every 2 years minimum
What would you keep a guppy in at home?
An aquarium or container that holds at least 1.5 gals of water with a heater/thermostat and filter, substrata, lights and plants.
In a 2003 Bonneville which of the hoses to the water pump is the heater inlet hose?
On a 2003 Bonneville, the hose to the water pump that is the heater inlet hose is the top hose coming from the radiator. This is also the hose that holds the thermostat.
Change the Thermostat on a 2003 Saab 9-3?
1. Drain the coolant by opening the drain cock or removing the lower radiator hose. Remove the lid to speed up process 2. Remove the throttle body ccover on turbo cars 3. Remove the bypass hose and the pressure pipe between the Intercooler and the throttle body on turbo cars 4. Rempve the screw that holds the coolant pipe to the water pump 5. Remove the screw that holds the coolant pipe in the front left of the engine 6. Remove the hose to the throttle body pre-heater 7. Remove the thermostat housing and remove the thermostat 8. Refit in Reverse source: saabcentral.com
You broke the part that holds the thermostat leading to the engine what is this part called?
waterneck/thermostat housing
Where is heater core location on 2005 Nissan altima?
The heater core is under the passenger side of the dashboard inside of the housing that holds and covers most of the A/C an Heating system components. IT is NOT easy to change.
Where is the thermostat on a 96 Nissan Altima?
The thermostat on a 96 Nissan Altima is located on top of the engine at the upper radiator hose. It is contained under the thermostat housing which holds it in place.
What is the black ball under hood with hose for?
It is a "Vacume Resivor" It holds a lower than atmospheric air pressure to operate poloution control and heater doors when the engine is operating at high load.
Does the 85 xj7oo have a thermostat?
There is what Yamaha calls a thermostatic valve. According to the service manual it is behind the horn underneath the fuel tank. The housing which holds the thermostat is on the end of the hose attached to the thermostat.
If a car has no thermostat what would cause it to overheat?
U NEED A THERMOSTAT. THAT IS WHAT HOLDS THE COOLANT IN THE RADIATOR, SO IT CAN COOL DOWN BEFORE IT GOES BACK IN THE MOTOR.
When the thermostat opens on a 1988 Lincoln Town Car why does the engine run cold and heater not blow hot air?
Thermostat is stuck open, not allowing engine to reach operating temp. Replace the thermostat. could also be your heater core needs cleaning also check your rad cap to make sure that it holds the pressureIf your question is more "why" and not what to do: Your engine gets hot and needs to be cooled. To do this there are coolant passages throughout your engine and they connect to your radiator which uses outside air to dissipate the head from the coolant before returning back to the engine. Your water pump circulates the coolant through the system. Your thermostat is like a door that holds the coolant in the engine back until it's hot enough to go to the radiator to be cooled. If it is stuck open the coolant will be continually circulated through the radiator and continually cooled... it will not allow your engine to "warm up"... all it is doing is preventing your coolant from getting up to operating temperature when it's stuck open. the way your heat works is it has a heater core, a mini radiator, under your dashboard. it has coolant running through it and when you turn your heat on it blows air through this heater core. if your thermostat is stuck open then your coolant won't be allowed to get hot so it won't be hot when it goes through the heater core with the fan blowing through it.
Why would a 1992 Corsica not blow warm or hot heat if you have changed the heater core and themostat and flushed the whole system?
Did you bleed the system making sure that there is no air in the system. Check the rad cap to ensure that it holds the pressure
