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MY HEAT IS not working?

Old 27-Sep-2005, 10:35 AM
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MY HEAT IS not working?

MY HEAT IS not working?

What could be the problem?? I am thinking it could be the thermostat!!!?
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Old 27-Sep-2005, 12:22 PM
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what do you mean your heat is not working? does it not blow any air? does it blow air but it is not hot? is it slightly hotter than ambient air at all?

your heater core may be plugged.
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Old 27-Sep-2005, 01:20 PM
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it blows air but not hot air, it is slightly warm air!
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Old 27-Sep-2005, 01:34 PM
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if it is the heater core shouldn't the car be losing some coolant?

the car does seem to run at normally operating temperature when warmed up!
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Old 27-Sep-2005, 01:37 PM
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what car? if its a civic, check the valve on the heater core hose. If it doesnt move when u change from heat to cold then thats the problem. Clogged heater core could do it. Is the engine staying at cold or does it heat up? if it heats up then thats not the problem.
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Old 27-Sep-2005, 01:40 PM
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the engine warms up to normal temp.

it is a 96 civic hatch
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Old 27-Sep-2005, 01:40 PM
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if the heater core is leaking then yes u would lose coolant, now if the heater core is clogged then no you wont loose coolant
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Old 27-Sep-2005, 01:41 PM
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Where is the check the valve on the heater core hose???

where is the heater core hose?
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Old 27-Sep-2005, 01:41 PM
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then its either got to be that valve, a clogged heater core, or broken temperature selector cable. What car is this for??????
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Old 27-Sep-2005, 01:43 PM
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96 civic cx hatch
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Old 27-Sep-2005, 01:44 PM
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Where is the check the valve on the heater core hose???

where is the heater core hose?
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Old 27-Sep-2005, 01:53 PM
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At the back of the engine there will be two hoses (smaller diameter than the rad hose) one will go into the firewall ( you will see a valve with a linkage that opens and closes it). Now the one below it is a return line from the heater core, that hose should be HOT when when you have the heat on in the car. If the bottom hose is cold then there is either a clog in the heater core(which im laying odds on) or that valve isnt opening up. You use any stop leak additives in your radiator lately?
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Old 27-Sep-2005, 01:58 PM
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i have not used any stop leak recently..........i would suspect that may cause the heater core to be blocked.

thanks for your help
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Old 27-Sep-2005, 02:26 PM
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no prob
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Old 28-Sep-2005, 11:13 AM
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the temperature selector cable works
the hose going into the heater core is hot
the hose coming out is warm (could be just from being in the engine bay)

i am thinking that the themostat is left open.........if it is left open would HOT air come out after 30 minutes of driving?

right now only WARM air comes out!
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Old 28-Sep-2005, 01:19 PM
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strange and odd
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Old 28-Sep-2005, 01:21 PM
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should i buy a honda thermostat or a cheap one from cdn tire?
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Old 28-Sep-2005, 01:34 PM
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Originally posted by 90celica
should i buy a honda thermostat or a cheap one from cdn tire?
Buy a Honda T-stat, it should come with a new gasket and retail for around $30.
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Old 28-Sep-2005, 03:55 PM
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if the engine is warming up to full temperature (temperature guage at the cluster) then the thermostat is doing its job. Your saying the bottom hose is jus warm??? should be hot
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Old 28-Sep-2005, 03:59 PM
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The hose with the switch is hot the other one is warm!


so u think the heater core is clogged

how hard is this to fix?
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