It got a little warm the other day and I turned the ac on but it did not work. went through the ac test button setup and it gave me a 416 code coolant circulation pump ? What is it and how do you fix it ? I an going to get a 134a refill kit and see if there is a sight glass to check the charge ..... any help is always appricated. thanks

 

See if this helps at all. It's based on my '95, but it might at least lead you in a good direction - I'm not sure how different your '97 is from mine. Be sure and check out the diagrams I've uploaded. Below is text discription on it's operation:

Description and Operation

The coolant circulation pump serves for maintaining a uniform flow of coolant through the heater core even at low engine speeds and in the residual engine heat utilization mode.

Function in heating mode
The quantity of coolant pumped to the heater core with the engine running depends on the coolant pump. The coolant circulation pump ensures that the water flows through the heater core uniformly without bubbles even at low speeds.

The coolant circulation pump is controlled by the pushbutton control module.

Function with residual engine heat utilization
The coolant circulation pump pumps the heated coolant to the heater core when the engine is standing still. When the REST button is pressed the temperature is controlled by the pushbutton control module (in the same manner as when the ignition is ON). The pushbutton control module switches the electric motor for the coolant circulation pump which drives the impeller via a magnetic clutch.

 

The car doesn't seem to have a heat problem it has a AC (cold) problem. I wonder if the coolant pump is stuck open or on and the ac and heat is on at the same time. Thanks fot the info.