Thanks for the reply Dutch.

At this time I don't know the answer to your question. I will check under the hood and get back to you.

The first time this happened, I called the mechanic who worked on the vehicle for the prior eight years. I told him the vehicle was running hot with A/C working. He told me this wasn't a problem. The radiator (also an aftermarket addition) was installed by this mechanic within the past three years.