1992 Auto HVAC help
Thread Starter
Le Mans Master
Joined: Feb 2011
Posts: 5,943
Likes: 61
From: Southern NH
1992 Auto HVAC help
On a '92 Auto HVAC, is it a normal condition that the heat blows full hot on 90 degrees, but anything below that it feels like it's mostly cold air coming out? It doesn't seem like it's blending the hot and cold on anything under 90. Not sure if this is normal for this old system or if something is wrong. The A/C DOES work.
thanks
thanks
Le Mans Master
Joined: Jan 2006
Posts: 5,621
Likes: 206
From: Orlando FL
My 94 does kind of the same thing. When initially driving and when it was cold outside and after engine warm up, I would set it about 74 or so. But after some time period and when the cabin has warmed up, I found pushing the temperature up to keep it warm. At some point I get to 85 and it is still cool and not warm or hot. But then to get some warm air in the cabin you jump it to 90 and it blows hot.
I just considered it normal for my car. I think the temperature sensors for the automatic control (micro processors) get warmed and thinks it's warm enough. There is a lot of electronics for the automatic climate control which is mainly in the programmer. I just don’t know if it is age on the car or that it was just never really a perfected auto system from day one. But my car has always worked like this and I have it 10 years so I think it is the latter.
I just considered it normal for my car. I think the temperature sensors for the automatic control (micro processors) get warmed and thinks it's warm enough. There is a lot of electronics for the automatic climate control which is mainly in the programmer. I just don’t know if it is age on the car or that it was just never really a perfected auto system from day one. But my car has always worked like this and I have it 10 years so I think it is the latter.
Thread Starter
Le Mans Master
Joined: Feb 2011
Posts: 5,943
Likes: 61
From: Southern NH
I did check for error codes and nothing came up. The customer ended up taking the car. He didn't want to spend much time looking at it that day since he was waiting and had somewhere to go.
Thanks guys
Thanks guys
Le Mans Master
Joined: Jan 2006
Posts: 5,621
Likes: 206
From: Orlando FL
I don’t think you will really find much actually wrong. Think it will be a wild goose chase going nowhere. I suspect it is the design of the system. Unless someone who has owned the car from day one and could substantiate that the system worked different or better when it was new.
Thread Starter
Le Mans Master
Joined: Feb 2011
Posts: 5,943
Likes: 61
From: Southern NH
I don’t think you will really find much actually wrong. Think it will be a wild goose chase going nowhere. I suspect it is the design of the system. Unless someone who has owned the car from day one and could substantiate that the system worked different or better when it was new.
Safety Car
Joined: Aug 2006
Posts: 4,147
Likes: 452
From: Port St. Lucie West Florida
My 94 does kind of the same thing. When initially driving and when it was cold outside and after engine warm up, I would set it about 74 or so. But after some time period and when the cabin has warmed up, I found pushing the temperature up to keep it warm. At some point I get to 85 and it is still cool and not warm or hot. But then to get some warm air in the cabin you jump it to 90 and it blows hot.
I just considered it normal for my car. I think the temperature sensors for the automatic control (micro processors) get warmed and thinks it's warm enough. There is a lot of electronics for the automatic climate control which is mainly in the programmer. I just don’t know if it is age on the car or that it was just never really a perfected auto system from day one. But my car has always worked like this and I have it 10 years so I think it is the latter.
I just considered it normal for my car. I think the temperature sensors for the automatic control (micro processors) get warmed and thinks it's warm enough. There is a lot of electronics for the automatic climate control which is mainly in the programmer. I just don’t know if it is age on the car or that it was just never really a perfected auto system from day one. But my car has always worked like this and I have it 10 years so I think it is the latter.
