Bought a 94 z28 a4. they bypassed the heater core because it was leaking. I get the car home replaced the heater core, hooked everything back up, i still get no heat. Im not sure what to look into now, if anyone could point me in some other direction, just something else to look for thatd be great! thanks!

 

Does the blower motor blow air at any speed?

 

ya blower motor is goin fine.. think i mighta found the issue, i think it might be stuck on cold. cable driven? maybe it broke or came unhooked

 

I don't think they are cable driven (if I remember right). If it's electrical I'd start easy and check fuses and such. If the heater was never used the flapper door could be stuck too.

 

just got a diagram. the cold/hot **** is ran off cable. thats probably my issue

 

If its not the cable then I would look to make sure the cooling system is properly bled. Those LT motors are sometimes finicky to get all the air out of the system and the heater core is usually the first place to get an air pocket and not put any heat out.

 

Heater core could be plugged up.....
Disconnect heater hoses and run water through from garden hose both directions this can losen the obstruction from the inside.

 

Hi,
i would check hoses when warm!!!!!touch heater hoses to see if both are warm.....leave radiator cap off!!!!!!!!!!!!!!!!!!! Is the water circulating after thermostat opens??????another item to check is blend/diverter on the control panel...............good luck and have a blessed week.....captain jim

 

+ 1 on the bleeding it these cars can be a pain getting all the air out!

 

I'm having the same problem when its really cooled outside my heater don't blow hot air at all but when its 40 degrees or warmer my heater works fine what could cause it to act like that

 

What temp is your car running at? Does it have a thermostat in it?

 

orange coolant likes to gum up. squeeze the hoses in and out of the heater core several times. if theres a blockage sometimes this will fix it temporarily. then you know you just need to flush the system.

 

It has green coolant in it I wont use dex cool it screws your motor up I have a 160 therma state in it and I noticed today that it starts to try to over heat when its warmer outside like today it got up to 81 and I've bleed the system acouple times already also I've noticed that I'm loosing coolant some how to