no heat just cold air

[joey71]

I have a 96 1.0 -- replaced the themostat-- water pump -- fresh anti freeze-- No heat at all just cold air-- there is one thing though -- the water in radiator is not circulating-- that is why I thought it would be the water pump--- any idea anyone???

[joey71]

heater core-- blinker switch ne one have a clue??

[geojim]

What does your temperature gauge show after what would be a normal warm-up time period?

Does your blower motor switch work on the dash?

When you switch the temperature selection switch on the dash from blue (cold) to red (hot), or vise versa, can you hear noise from the flapper switch as it changes position?

[joey71]

Originally Posted by geojim

What does your temperature gauge show after what would be a normal warm-up time period?

Does your blower motor switch work on the dash?

When you switch the temperature selection switch on the dash from blue (cold) to red (hot), or vise versa, can you hear noise from the flapper switch as it changes position?

the temp guage stays right in between hot and cold-- the rad fan is doing great there-- blower motor works fine at all speeds-- you can hear the "flappers" changing from vents to floor to the defroster-- I received the car from my brother and I did notice black markings (stained in the dash) at the defrost area where air would come out-- but the car has never had a fire of any sort-- Thanks-- Joe

[geojim]

Water must be circulating in the main part of the engine or it would overheat during normal operation. It sounds like you may have a blockage in the heater hoses from/to the engine, or in the heater core itself under the dash. Under the dash is not a fun place to work.

[geozukigti]

When the engine warms up, touch the heater core hoses, and see if the hoses are warm. If one is warm, and one is cold, you've got a blockage in the heater core. If they're both cold, you've probably got a kinked, or clogged line. Knowing previous owners of geo's and how some people don't care for them at all, it may have had the heater core bypassed because of a leak.

[chembrad]

Check your heater core for flow through.

Pull off the in/out to the core and try to blow through some compressed air. You will know real quick what the problem is. If the coolant comes shooting out, then your core is not clogged. If nothing or very little comes out, then it is your core.

If you (or someone else) have ever used that "stop leak" crap in your coolant, then you can bet it is the core. Sometimes you can blow it out. Try REAL hard.

The core is a pain to replace, but if you just use your shoulders to lift the loosened dash while replacing the core, then you won't have to remove the entire dash like the manual says.

Watch carefully how your airflow baffles are put together. Putting it back together from complete disassembly is the worst part... Don't do it!

FYI: if your radiator is leaking, just replace it... don't use the stop leak, You are only making your repairs worse down the road.

Radiator is simple to swap. The heater core is cheap, but labor intensive.

[chembrad]

geozuki is right about people bypassing the heater core rather than fixing it. But that should be obvious.

I assume that your heater worked for you at some point in the past.

geozuki is also right about people not caring for the vehicles. They paid little for them and treat them as disposable.

Imo I think they are great little cars that are both inexpensive and easy to work on. A great starter car for a young man just learning how to work on cars.