I have a 2004 Honda Accord with Nav. and dual climate controls. I have a problem with the air conditioning that I have not seen before. The A/C is blowing cold air but when using the temp controls with the AUTO setting engaged it is weekly blowing out of the vents. I have replaced the blower relay(last year) and had the system recharged last weekend, still not working as it should. If I lower the temp to the lowest setting it does blow with some force. If I set the controls manually to the max setting it will blow with some force. I need some help identifying the problem...Please Help!

Thanks

 

Look for a thermostat located somewhere on front of dash. You'll need a electrical diagram
To check its proper operation.

 

The Climate Control System has extensive self-diagnostics capability. You will need a shop manual to guide you on how to extract codes and what they mean. Suggest purchasing a download manual from automanualsource.com for $22.

There are sunlight sensor, cabin air temp sensor, outside air temp sensor, and evap temp sensor that could be source of your problem.

good luck