Steveatp

I have been troubleshooting my 2006 Hummer HVAC with the blinking snowflake when the temperature is in the 60s my reference voltage on my ambient temperature sensor it's only 4.75 at startup and the raw temperature indicates about 40 which puts the filter temperature below the threshold could my problem be the IC inside hvac module providing 5v (normally) be the culprit of this problem my sensor ohms out perfectly