no heater?

Do you have "Dual Climate Control"? If so, then the controls and/or the switch for that is faulty.

If not, then the "Diverter Door" inside of your HVAC unit is faulty.

This guide can help

https://www.2carpros.com/articles/car-heater-not-working

Let me know, as well if you intend to repair this yourself and I'll walk you through the procedure.

If you just need advise for dealing with a shop, I can help with that as well.

My vehicle has similar problem, although I have plenty heat but passenger side only has a/c. was diagnosed as blend door actuator, would this be correct?

My Vehicle has the exact same problem as BigTex. Is this something I can fix myself?

The diagnosis and repair procedure would be the same if the vehicles and options are the same. However, the problem wouldn't be with the blend door but the "Diverter door".

No heat blowing on driver side but heat is blowing on passenger side and at idle at a stop light more then 3minutes it kicks in hard and acts like it wants to shut down but it does not can you help me please

Does this vehicle have dual climate control?

Yes it is dual climate control

Have you checked the blend air door near the heater core. There are two with dual climate control. It sounds like one is working and the other isn't.

Car getting hot what's norm temple i

When cruising over 40MPH is will run aroun thermostat temp of 195 but when idling or in slow traffic it can rise to 225-228 because the cooling fan is programmed to let it run hotter in those conditions.

1998 Buick Park Avenue

The heater blows cold air on the drivers side and warm air on the passenger side. This is true in the defrost, vent, and floor modes.

You have dual climate controls? Are there any hvac codes? Maybe the code would point in the right direction. With dual control, there are temp sensors on each side. I can't say the temp sensor is faulty?

There are dual climate controls, do not know about codes, as I do not know how to retrieve them.

Some of the national brand autostores used to check some codes for free. Don't know about B codes? You can call and ask? You can get a code reader, just make sure it will read all manufacturer specific codes, plus generic codes.

Which actartor side do I need ? In winter weather the heater blowes cold air on the driver side and heat on passgar side. what would be the repair cost over all?

see if your car is vacuum or elctricall operated actuators. it could be a vacuum leak to a motor or the otor itself is not working. the pic i'm sending isn't for your car but i cna't find one anyhow so it's kind of generic, but will give you an idea . also the vacuumleak could be form teh motor as well. repair parts vary depending on brands etc. just call an auto parts store

THANK YOU FOR GETTING ME HERE.

ya i screwed up i sent you the wrong drawing this other one may lead you in the rightdirection. it is generic as well.

My ac or heat is not working if I turn the heat on nothing blows and if I turn on ac same thing so I looked at fuses for about 5 mins swapping them out and I noticed my 2 engine fans in the front are not moving at all I put car in reverse and in drive with the hood up and still no movement from the fans it gets a little hotter than what it supposed to but hasnt overheated yet. what could this be please anybody help.

check fuses for hvac to see if it is blown. one fan shold come on when the a/c is turned on. pic shows location of fuses to check. this could be a module problem as well an dneed to be scanned to find problem.

Checked fuses all of them are good I disconnected the fans and gave them direct voltage and the fans did nothing but the motor in the fan just made a humming noise so I know the fans are bad but that only fixes 1 problem I still don't know why I'm not getting any heat or ac/ no blowing at all

there are actuators that move heat to ha/c in heater they are either vacuum or electric they can be on pass or drivers side under dash.seee if what i have pointedto that these are getting power sometimes if you pull the hvac fuse with key on these will reset an dwork.

1998 Buick Park Avenue 6 cyl Two Wheel Drive 310000 miles

After a mechanic tried charging me a ridiculous price for NOT fixing my car, I found that my heater no longer works.

The climate controls work and the fuses are good. The thermostat is working. I see no heater hose problems but no hot water seems to be flowing thru my heater coil.

What do I look for?

Does the blower motor work? Heater hoses hot?

Yes and Yes

There are hvac trouble codes, I'd have to check them. They are B codes. I can't think of anything else at the moment.

I CANNOT TURN THE HEATER/AIRFLOW/FAN OFF
INSIDE THE CAR THE OFF BUTTON INCLUDING THE INSTRU. PANEL IS NOT WORKING, MAYBE A FUSE? OR NOT?

The blower motor relay could be sticking or a defective HVAC contdrol assy

When I turn on the automatic control ,the heater or ac, the cold air or heat comes out the defroster an heater slots,not out the slots in the dash.

there sould be an electric motor that controls the blend doors, where the air comes from, more than likely you will need to replace this.
John

There is a vacuum hose (90 degree, molded) under the hood (near the master cylinder) that easily gets knocked off. Look closely it's small and easy to miss.

Since replacing the small bypass hose and fitting into the intake manifold, the heater won't blow warm air regardless of the temperature setting. Also, the temperature display on the dash blinks for a short time after start up. Is there any way to reset the temp control module, or should I assume it is fried?

are u sure u have removed all the air from the system i am guessing that it has the 3.8 engine and they are very hard too remove all the air from the system and did the heat work befor u changed the bypass hose if not than i would check your handbook that came with the car about resetting the module hope this helps lsauto

Last week two problems happened. One was a battery, that didn't like the -14 F overnight. The other one is barely any heat coming from any outlet, floor, dash, defrost. It does have dual zone HVAC for DR/PASS sides. The night when it got so cold, my antifreeze was only good for about -10 to-12 F. All freeze plugs and hoses survived the chilly engine.

After installing another battery for my 60 mile drive in below zero temperatures, I almost froze! I have replaced the thermostat with a 195 F. Added antifreeze to better protect the engine. I still have the same problem of minimal heat and cold air on Pass side whether Dual zone is off or on. Vacuum controls seem to work to direct air to all the right places. Luke warm on DR side and ambient/cold on PASS side in all positions.

I have tried to access the error codes y trying "OFF" and "High temp" at the same time. No change in display, so this does not work for this car.

I believe the problem is with a blend door or electrical actuated solenoid.

If so, where does a person start?

With the heater on high and the engine warm, do both heater core hoses get hot?

Coolant flow does not appear to be my problem. Both hoses appear to heat up. Below 20 F the PASS side is cold, DR side is warm, not hot. Around 50 F both sides are warm on low fan. High fan the PASS gets cold and DR side is warm, not hot.

If both heater core hoses are getting hot, then chances are the problem is the blend air doors. With your vehicle, there are two doors, one for each side. They are located near the heater core. Check to see if they are opening and closing.

Sounds like "open dash" surgery! That is what I was afraid of. Luckily the PASS side seat only has a couple of wires and four bolts to remove.

Thank you, jacobandnicholas!

Hello, I have a question. I recently purchased my used vehicle and when I did, the heat worked great. Now for whatever reason, the heat will only blow out when the car has been turned of for a significant amount of time. For example, in the morning when I start the car the heat comes on. When I leave for work after an 8 hour day, the heat comes on. But if I turn the car off and say turn the car back on a few minutes later, the heat will not come on. All my lights are lighting up and I occasionally here a click like it wants to come on, but it does not so I did not think it would be a fuse but I am really not sure what it could be. Your help is greatly appreciated.

do you mean the blower wont come on? or the blower is blowing but no warm air is coming out of the dash?