Climate system suddenly stop working and begin to give heat and humidity just like a sauna, the system shows a warning of "engine overheating, slow speed" even on cold days, and with car stopped, then when the engine stops, the motor fan stay on for a long time, around 5 minutes
on the last regular maintenance, i have asked for a climate system checking and i get an "all OK" twice
I had tried none so far, just try to use less possible the climate system
just want to know the possible cause to this and how to solve it
thanks

 

Uncontrolled heat and humidity is a possible sign that the heater core or connections to it are leaking. Have you checked your coolant level?

 

 

I would suggest you check the coolant level yourself. Page 312 of the US owner's manual shows the location of the expansion tank:

https://volvornt.harte-hanks.com/man...ers-Manual.pdf

Even if the coolant level is OK, there could be a problem with a control in the system. Since you are getting warning messages on the dash, the dealer or a mechanic should be able to retrieve those messages, or at least reproduce the problem you're seeing.

 

Also: When did you have your last maintenance done? How long has it been since the system was checked and declared to be OK?

 

the last maintenance was on january, additional to this one on december was the change of battery
in both occasions i made a system check solicitude
The system works like a normal house air cooling equipment?
letme know if i'm wrong (maybe its a dumb cuestion)
as far i know this needs a special gas pressurised, then is possible than this needs a gas recharge? or works only with the coolant liquid?
and if this is true.... where can i ckeck this ?

thanks

 

Conceptually the car's climate control system works similarly to a home air conditioning system, I guess. What's relevant for this discussion is:

- The system has an element called a "heater core". The heater core is basically a radiator that is typically inside the dashboard.

- The system also has a fan that blows air through the heater core.

- The heater core resides within ductwork in the dashboard and the cabin. This ductwork ends at the various air vents in the cabin (on the dash, under the dash, under the front seats, in the B pillars between the doors, probably other locations I'm not remembering).

- Back to the heater core: it is connected to the engine's cooling system. The engine's coolant (radiator fluid) flows through both the radiator and the heater core (when the climate control system thinks that the cabin should be heated).

- While the air conditioning system (which is also integrated within the climate control system) requires freon to operate, the heating system uses the engine coolant; there is no compressed gas used for the heating system. The automotive heating system operates differently than a heat pump on a house.

As discussed above, you can check the level of the engine coolant within the system (which includes the heater core); see page 312 of the US owner's manual for the location of the expansion tank:

https://volvornt.harte-hanks.com/man...ers-Manual.pdf

I have attached a PDF of that page for your convenience.

As discussed above: if the coolant level is normal, you should be able to have the mechanic reproduce your issue and thereby get the mechanic to tell you what is going wrong.

 

very detailed explanation!
i will follow your suggestions
thanks a lot