Question about 1993 Honda Civic 4 Door

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My cars heater is not working, I have recently replace the Coolant, and the thermostat, and am not sure what to look for next. This is a 1993 Honda Civic CX 2 door hatchback.

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  • David Johnson
    David Johnson May 11, 2010

    look for the valve that opens and closes to allow circulation to your heater core. Hope this helps you find the problem.

  • spic73_08
    spic73_08 Dec 25, 2012

    try your fuze

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  • 962 Answers

First check to see if the hoses to the heater core are hot. if they are not hot do the following.
Check the valve where the heater core hoses go into the cab, if the valve is good , you may have to wash out the heater core by removing both hoses at the firewall and run some water through the heater core until the water comes out clean of rust and debris.

Posted on Dec 16, 2008

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2 Answers

I have a 1996 honda prelude i have changed everything in the coolant system and it still over heats what could possibly be causing this


im sorry to tell you that after changing all components in cooling system, (Im assuming this included the waterpump?) your problem is most likely being caused from cylinder head gasket failure. Removal of the cylinder head to replace this gasket should only be undertaken by a very mechanically minded person. Good luck.

Mar 11, 2011 | 1993 Honda Prelude

2 Answers

My 93 honda accord lx is over heating what do i do?


The first thing is to make sure the coolant is full, check it when the engine is cool, check radiator level, if coolant is full then check for bad thermostat, run engine and as it overheats check both hoses to make sure they are both hot, if one is hot and the other warm then you will need to replace the thermostat.if both hoses are hot then you may have a bad cooling fan or sensor, hope this is helpful.

Oct 19, 2010 | 1993 Honda Accord

1 Answer

No heat, changed the thermostat, no luck


If the thermostat is ok and you've got a full coolant level, next try touching the water lines going through the firewall to the heater core. Both lines should be hot to the touch. If only 1 is hot, you have a blockage in the system. If both lines are hot then you may need to replace your heater core. Also have a pressure test done on your cooling system before you go spend a lot of money because you may have a problem there which would prevent enough pressure from building up to push the hot coolant through to your heater core.

Jan 09, 2010 | 1993 Mazda MPV

1 Answer

1992 Honda Accord cooling problems--Please help!


I smell a bad water pump.. If your water pump is bad you get very poor coolant circulation not to mention at a stand still(red light) you get less air flow to cool down the coolant. Since you have poor coolant circulation you wont get the proper coolant to heater core as well so you get less warm air threw heater. Not to mention that when a water pump is faulty and you have a thermostat it allows even less coolant circulation compared to a constant flow of antifreeze. I would have it checked. Good luck

P.S, I am assuming that your electric fans are working and you have to proper mixture of antifreeze and water.

Dec 07, 2009 | 1992 Honda Accord

2 Answers

Cannot get heat even after changing thermostat in 1992 honda accord what do i check next


Check the heater control valve. It is usually behind the engine up next to the firewall. Have someone inside the car move the heater control to heat. A lever on the heater control valve should move when this is done.

This valve allows hot coolant to enter the heater core inside the car. If this hot coolant doesn't arrive, you have no heat.

Oct 14, 2009 | 1992 Honda Accord

1 Answer

1993 honda accord running hot, changed thermostat


I had a similar problem with my 1993 honda and had to change the radiator.

Aug 20, 2009 | 1993 Honda Accord

1 Answer

1986 honda prelude heater


Radiator flushes can cause more problems than fix sometimes. Before you go removing the dash first replace the thermostat if you follow the lower radiator hose to the engine this is the thermostat housing.Remove the three 10mm bolts and the housing should come apart. Make sure you put the thermostat in the right way and not upside down. The larger end with the spring goes in first toward the engine and the little vent should be on top. When you fill it back up with a 60/40 mixture of coolant make sure you open the bleed hole on the thermostat housing to get out any air and tighten when coolant comes out with no air bubbles. Start the car and hopefully the heat is better. If not the heater core is the two coolant hoses on the firewall remove both hoses and check the flow with a water hose put the hose to both sides to get out any debris. If the flow is slow and does not improve you will have to pull out the heater core which means removing most of the lower dash pulling out the evaporator if you have A/C. Make sure you get a manual. Hope this helps.

Dec 14, 2008 | 1986 Honda Prelude

1 Answer

AC works, Heater not working, 2003 Hyundai Accent.


Check the coolant level, do this with a cold engine. Or if you have recently used it. let it cool down for about 25 minutes before removing the radiator cap. if it is low, refill with coolant. If it does not, check your thermostat. Or better yet replace your thermostat. Be sure to get the right one . the same degrees as your old one. Just ask the teller to give you one for your engine size and car Model.And year.See where the radiator cap is. Then drain some coolant to where it will not spill from the radiator cap. Remove the hose nearest the radiator cap and you will get to the thermostat housing. Remove the housing and note how the thermostat is placed. Take of the thermostat housing and the old thermostat. Clean the housing and around the hole where the thermostat goes of any deposits. Get some grease and cover the new gasket with grease on the housing to hold it in place. replace the New thermostat and make sure it is flush with the engine and the housing. If it is off , you could break the housing upon tightening the housing.replace the hose and refill with coolant slowly to eliminate any air spaces.. Also check the coolant reservoir and fill it to the indicator line. Restart the car and chek for any leaks. Then check the heater after the engine heats up. If that does not do the job it could be the temperature sensor or the heater core.The heater core will take more time to check and clean or replace.

Nov 24, 2008 | 2003 Hyundai Accent

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