I was reading a thread on a similar forum because I have lost one pint of coolant and had coolant in the reservoir bubbling. One comment mentioned that SCs have a problem of the heater control valve leaking at the firewall. When I opened my hood again, I noticed that the plug was disconnected. Would this have any relation to loss of coolant and bubbling in the reservoir?
If no connection to my problem, what else is affected by having an unplugged heater control valve?

 

Can't imagine it having anything to do with the coolant loss. It would be an open circuit into the A/C control assembly point WV, so not sure what the result of that would be, couldn't find the circuit description.

 

As I recall, the valve is Normally Closed, so I imagine an unplugged HCV would mean no heat circulation (HVAC). Being in Florida, maybe you've never needed heat and haven't noticed??