Symptom #2: At temperature settings between LO and HI, the vent air temperature fluctuates wildly, or takes very long to respond to a user setting.
Possible cause: The In-cabin Temperature/Humidity sensor could be faulty, or just dirty. This sensor is located just above the ignition key lock area. Carefully pry off the small plastic grill to expose the sensor. Use an air can to blow out the dust, and use a sensor-safe electronics cleaning spray to clean the sensor. If the situation improves after this, but not enough, then the sensor may need to be replaced. A lot of parts need to come out in order to get access to the sensor, so it is not a quick and easy job to replace this part.
There are several instances where the identification of a strain may be useful in mastitis control programs. The identification of failure to achieve bacteriological cure after treatment versus development of a new infection is an example of when DNA fingerprinting can be useful. Historically, bacteriological cure has been defined based on comparing results of cultures taken before and after treatment. In general, if the same bacterial species is found in the post-treatment samples, a treatment failure was assumed. However, comparison of the DNA fingerprints can be used to determine if that species is the same strain as the strain found in the original IMI (and then presumed to be a persistent infection) or if the bacteria is a different strain (and presumed to be a new infection). Comparison of strains of bacterial species can also be used to determine if diverse strains of opportunistic organisms from the environment are causing mastitis versus identical strains which may indicate cow-to-cow transmission. The recovery of identical strains should not be considered to be absolute proof of cow-to-cow transmission because identical strains can also be recovered if the dominant pathogenic strain in the environment is a consistent strain. Thus, even DNA fingerprints do not necessarily provide conclusive evidence that indicates contagious transmission of mastitis pathogens.