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Re: i have no heat
Sounds like you may be low on antifreeze. ck and top off as nec. then run vehicle again if was low. if engine is running at normal temp (around 195-200 degrees) and not fluctuating, then a possible restricted heater core is suspect. you can flush these cores out fairly easily at firewall under hood. (do this before replacing core, pressure washer works well). if engine temp is not normal(reads low) or fluctuates, replace thermostat.
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The first thing to check is the level of coolant-is it full? Because no heat is the first indication of low coolant. When car is cool, open radiator cap and fill with a 50-50 mix of antifreeze and water. Also fill the overflow tank halfway up with the coolant mix.
Also feel both heater hoses after the car has come to normal operating temperature. Both should be hot. If they are, the heater is working as intended. If only one is hot, the coolant is not circulating through the heater, and someone will have to get that working-possibly an air block in the heater core, possibly a plugged heater core.
Finally, the blower motor may have wore out. Without the blower, very little heat will come out. Test or replace the blower motor.
It sounds like you have climate control.If you do, then you will have to check/change the climate control computer before continuing. May I also ask with make and model of vehicle you have in case I know of any common faults. Try cleaning the interior air temperature sensor or checking this for a fault too.
have 2002 altima,blower works no heat at idle and very little heat when accelerating.I changed carbon cabin filter,made sure little gear under dash to temp knob wasnt broken,flushed and bled system.Nothing worked so checked hoses to heater core and found inlet hose was hot,outlet hose was not.So investigated this problem and came to conclusion heater core was clogged.An easy way to check is to get car to normal running temp. put on heater and blowers at full.Go under dash on passenger side where counsel meets firewall,this is where heater core core inlet and outlet aluminum tubbing go through firewall,you will be able to feel both tubes one closest to you is outlet, so if this one is not hot and and other is your heater core is clogged.I detached both inlet and outlet hoses to heater core from water control valve.Then I blasted water with waterhose and nozzle set at jet,first through outlet hose to blow gunk out,then through inlet hose until water runs clear.Reatach hoses fill and bled system.heater works great nice and hot!
it sounds like you have a air blockage, or the cooling system needs flushed. to flush system go to ( autorepair.about.com/od/regularmaintenance/ss/coolant_f...) click on 3rd one down. remember to bleed air out of system, this works the best. turn heater and blower on high, start adding coolant. start car let it idle till radiator thermostat opens. when top radiator hose gets hot you should have heat. some vehicles have a bleeder to let air from system. when filling putting coolant in system. if it does, then open bleeder while engine running and putting in coolant untill there are no air bubbles coming out. have a good day !! when doing flush if need be. you can go to any auto parts store and buy radiator flush. follow directions on the back ( prestone is best )
If the blower is blowing air just fine, but you cannot control the temperature, you need to listen to air coming from the vents while turning the temperature from hot to cold. If you do n ot hear any change in airflow, then you may a temperature door in the dash broken. this is becoming a common problem on the Equinox
Pretty sure I have answered this about a million times. Blower motor is on engine side of firewall on passenger side. You can run a hot lead to it to check if it's working! You did check fuse... Right?