Questions & Answers for: coolant wont flow heater core

...wont work. the blower and the a/c work fine where do i start? First thing to check is the coolant level. The heater is the lowest priority of the cooling system so if there isn't enough coolant, none ...

...coolant is low it can cause an air pocket in heater core and it wont pass out until rpm's increase by the extra flow of water pump. if it is full then might wanna try removing heater hoses and back ...

...wont switch from ac to heat Start searching for a vacuum leak. The dash switch operates a vacuum assembly - but if the line is cracked, it "door" will not change position. Check operation of heater ...

...coolant cant enter the heater core hense wont heat up the cabin, reason #3 clogged heater core, over time some heater cores will clog up even sometimes start to leak in cabin. All these are normal ...

...wont work fan works fine but only cold air comes out Could be the diverter valve. It's the one located near the firewall in the engine bay. The valve is in-line on one of the two coolant hoses that ...

...coolant lines at the inlet and outlet of the heater core are both very warm, but not neat the 195 of the new thermostat. Any suggestions? Move to Arizona? if it is very cold outside the air doesn't ...

...wont get hot air One of two things: 1)Heater core may be plugged - on most vehicles you can switch the heater hoses around to reverse the flow of water to try to remove the blockage. This will be a ...

...coolant and wont work properly without it and could also damage your engine if it run with a low coolant level Not just the level, you could have an air bubble in the system. Have you had any work ...

...wont the heater get hot? Either the heater core is plugged, or the vacuum motor that controls the flaps in the dash is not functioning or connected up properly to allow cold or hot air to come into ...

...wont let heat come out heater core seems ok I am a mechanic and auto-motive electrical systems technician, just a side note, currently while answering this question i am preparing to go complete a ...