Buick Repair Questions? Ask a Mechanic for Answers ASAP
Hi, I'm Cam. May I ask your first name? I am working to get you a fast accurate answer. About your vehicle, Does ite go full cold or just cool to warm?
Full cold. As if you had the a/c on. Even when the temperature sliders are all the way to hot. Moving the sliders up/down does nothing, temp stays cold.
IF it blows out heat when the car is moving it's only warm, not as hot as it usually is.
Sally, is the check engine light on?
The "Service Engine Soon" light is on.
Sally, I am suggesting a FREE scan. I can't see your car so I am asking you to get it scanned FREE. I suspect the code will be a P0128 and that it needs a new thermostat, but I don't want to say GO SPEND MONEY until I am sure and we look at everything FREE or as CHEAP AS POSSIBLE first. Please work with me here.
What do they need to scan exactly? So I can tell them what to do and see if they will do it for free
Most part stores, go in and tell them your check engine light is on and can they scan it.
Record the code number and reply back here then.
It is under the dash, left side around your knee or shin.
But the service guy didn't think that would relate to lack of hot air blowing out? he thought I would have seen a dip in my temp gauge on the dashboard (which I haven't, it's been running in the normal range as usual).
Can a P0128 code effect the heat?
This code is almost always set because of the thermostat opening too early. The computer sees the engine has not reached a set temp in a set time and assumes there is an issue. The code is actually for the coolant temp sensor, but I have yet to see this code set because of the sensor. Replace the thermostat and see. It is not an expensive part.
Would the broken thermostat keep the blowers from blowing out hot air?
Not trying to be obtuse, but to see the connection.
Yes, the engine will not get to full operating temp so it will not force the water through the thermostat. Start with the thermostat as it is the cheapest place next to go and I have a good feeling it will fix this.