windshield is fogging up

Is the blower motor working?

It is blowing luke warm air and thats it so i guess my answer would be yes the blower motor is working.

Okay, with the engine running, hot, and the heater on high, feel both heater core hoses. Both should be hot. If they are, check the blend air door. It is near the heater core and is responsible for the air temp entering the vehicle. If only one hose is hot, you may want to try flushing the heater core to make sure it is not partially plugged.

Thank you we will try that now

Let me know what you find.

Okay my husband says they are both hot and he has no idea what the blend air door is. Should we take the car back to the mechanic who replaced the heater core and water pump in july?

Yes, I would take it back. The blend air door is part of the HVAC system and is located under the dash near the heater core. The temp you get in the vehicle is based on how far it is open. If it isn't working, you will not get heat.

Since both hoses are hot, the heater core is working and not plugged. That is good...

Let me know what you find.

Thank you so much for your help. We will let you know what the mechanic says tomorrow.

check the heater control valve on the heater hose.there is a cable running to it.when u move from cold to hot.you will see the valve open and close.if the windows fog up its a signs of a leaking heater core.look at the r/side underdash at the firewall youll see the drain hose check for signs of coolant inside and outside or on the drain hose.

Heater core new, both heater core hoses are hot... No control valve on this vehicle. I suggested blend air door. What do you think Cadie?

the fogged up interior tells me the core is leaking.ck the drain hose through the firewall.for signs of coolant in and out.pull the r/side carpet up and look for coolant.hook up a pressure tester pump it up and start looking.

They have no heat... I understand the fogged window, but nothing mentioned of film on glass or smell... The idea there is no heat leads me to believe it is the door. Could be wrong but that is what I feel is the problem they are having.

they need two take it back for sure

I agree

After reading all of your posts I realized I wasn't as specific with symptoms as I should have been, sorry. So here goes...In july of this year we had both water pump and heater core replaced. Yesterday, we noticed a film of steam on the windows, very luke warm air coming from vents on defrost and heat. No water on floor boards but the last time we had them repaired there was no water on floor boards either. Thermostat is working. Both hoses feel hot to my husband. No noises or smells that we can notice. We had a friend look at it and he couldn't find any leaking hoses. Temp is not going up but then again it's cold outside. We are taking it back to mechanic today but it cost us 500.00 last time and right now we just can't afford that. How long should these things last? Thanks again.

Okay so the garage isn't sure what's going on with my car. They looked at the blend door and it is working. They also said the water pump and heater core are working. They want to flush the heater core to see if there is a small leak. Wow really now what? So why else would we not have heat any ideas?

if you have core flow and no heat and the fan is working.youll need a diagram of the a/c cases and acuaters.j and n can u help us with that.one thing not working causes problems.

Are you referring to the blend door?

Well they flushed the heater core no signs of a leak. Still don't know why we have no heat and fogged windows. Uggh I really hate cars and I know this one has to be female because every two weeks when I get paid she wants something new lol. So if anyone has any ideas please let me know.

Is the fog causing the windshield to get a slippery residue on it? Also, if the heater core is flowing, the blend air door must be stuck. Double check that.

Well great news, something must have helped all of a sudden today we have heat and the windows are not fogging up. I still have no idea what was wrong with it, but it seems to be working. So thank you to everyone who tried to help.

and you may never know.glad for you.

Glad it is working for you. If you have problems again, let us know. I still feel it is the blend door, but like cadieman said, we never know.