How to fix heater prob.it is stuck on high and none of the other buttons will work,and is it a hard job to replace it

You have what is called a blend door that is inside of the air box that switches air flow between the heater core and the evaporator core. It sounds like either the actuator motor or the blend door itself might be either stuck or bad. Depending on what you are working on, this could either be a hard job, or a very hard job to repair.

if it only goes on high, the resistor needs to be changed . It is on firewall ,passenger side of car under wiper assembly behind alternator. not a hard job to do, part is not expensive. you will get low,med , and high back. if not switch on dash panel, or change blower motor, last ,since it is going on- working. good luck

Hi Shawn,your thermostat may be stuck open,not letting your coolant heat up.check this first.here's a link on how to replace, GET 25 GIFT CARD FOR EVERY 100 SPENT ON ONLINE SHIP TO HOME ORDERS After removing,look at it,it should be closed,to see if it is working,boil water to 180 degrees with thermostat in pot,it should open at 180,remove from water and it should close,if it's doing this,then it's good,is your water pump working properly,no leaks.Here's another link to your heater core, GET 25 GIFT CARD FOR EVERY 100 SPENT ON ONLINE SHIP TO HOME ORDERS I am fixing to replace my heater core in my 85 Nissan 720 truck,did it 10 years ago,my heat still works,but my windows fog up super fast,which means it's leaking,can put my hand on the carpet by the heater core and feel coolant,it's a job.

wiring prob from the plug to the block heater

prob the dash control is going out pretty common not to hard to replace

ok this is a easy fix...take out your drivers head light lens..under that is a bunch of wires..i think it is pink or red wire chevy had a prob with ...might be hard to find but 100% this is the prob there will be a broken wire there..like i said im sure it was pink or red....

Hello,
If you are refering to the fan it could be the fuse or the fan resistor or the fan motor or the high blow relay or the wiring in that order of possible causes.

I hope this helps.

Roy

yes it's hard cause the hoses are always stubborn and prob way under the front on the firewall neer the bottom of the car and you have to lay upside down when you take the heater core out and half the dash :) so ya it's not a nice job but can be done .

Heat adjuster door fix does not have to cost a lot of money. Search for Heater Treater. I lost dual control functionality but it is way better than the $1800 the dealer wanted to charge me.

well, check the fuse/relay then you will need to remove the control panel to access the switch then check the switch its self in all positions with a volt meter. if none of those things have found the prob then you prob have a bad blower motor. most likely its a fuse/relay usualy or a switch. when a motor goes it usually will still blow on high. if its out completely it ususaully smells like burnt tape.dont worry its prob something simple and cheap, ie fuse/relay. Let me know [email protected]