FAN DOES NOT BLOW AIR INTO CAB

Air in the system ! Cooling fans not coming on ! You put the thermostat in right ? What engine ? 3.0 or 3.9 L ,Hook up a scanner that can view sensor data parameters , what is the PCM seeing from the cylinder head temp sensor .
I would think air pocket in the heater core because no heat coming . Heater hoses going into the fire wall , are both hot ? Hot water valve working ?
How to Fix Car with No Heat Easy

It would indicate a bad hot water valve on the hoses connected to the heater core.

Buick LeSabre Heater - RepairPal

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Buick LeSabre Heater blows only cool air...even w/ defroster on. This is a ... Heater fandoesn't come on . ... The blower works but there is no heat coming out.

Blower Motor Problems ' Auto Repair Help - YouTube

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Sep 27, 2009 - Uploaded by mgittelman
The blower motor is a common heater/AC repair within the skill level of ... However if the power wire is a single light purple wire and the ... for blower motor and fuel and relay good but no powercoming on both any ideas? ... my o5 seira, when i start the engine with the air switch on it blows my blower fan ...

Car Air Not Blowing, Heat & Air "How to" Test Testing ...

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https://www.youtube.com/watch?v=hgar6Q1lV6A
Apr 5, 2013 - Uploaded by Fixbook
Here I show how to determine the problem if your air, or blowermotor is not ... Click here to check out the the "Car Runs on 2 cylinders" series: ... How to Fix Over-Heating engine & No Heat in car - Buick (2000 yr) Park Ave . ... Car fan / AC only works on high - Replacing the Blower Resistor - Duration: 4:24.

Buick Park Avenue Questions - NO HEAT!!! - CarGurus

you don't have one what is wrong ? no heat? no forceful air coming from the fan? cold air blowing heater functioning? temperature gauge reading very low and as you drive it drops to cold? you must tell me what is wrong and I'll be able to take it from there

Check the heater control valve. And verify if there's hot air w/o A/C (fresh air with heat setting to cold)

Sounds like a faulty mode door actuator for the a/c in the dash. There are a series of mode doors that controls air temperature and air flow. They are located in the passenger side of the dash. If the temperature mode door isn't closing all the way then when you could still be getting heated air from the heater core when on A/C. The blowing only out of the defrost is a textbook sign of a bad mode door actuator.

there is a cab air filter located under your hood, pass. side under the wiper area, but this should not be the problem if your loosing coolant, check your heater core, if your fan only works on low. check your blower resistor you can pick em up new for around 20 bucks. hope this helps and god bless.

When pressing the button to turn on the heat, fuse blows.

- If temp guage reads normal, the lack of heat may be due to the Heater Control Valve. Located in front of the radiator. Lower passenger side. A real bugger to replace.
- The plastic cap just over the thermostat is key in re-filling the anti freeze and bleeding air.

Hi There, If the fan blows only cold air, then you might have a restriction on the heater core. The heater core is like a small radiator inside your dash. The coolant flow through it can be restricted by corrosion. The lack of flow of coolant through the heater core will result in a lack of warm air inside the car. Flushing out the heater core may help. If not, you will have to replace it. I would say though, 80% of the time the cause is just restriction. Get the heater core flushed and I am sure you will get your heat back. MIke