Water is getting inside of car on passenger side. and i think it effected the radio and heating/cooling system.

classiic HVAC failure? LHD left hand drive car , no country told.
own for how long, 2years or 1day/ or what ( right passenger door?) for rain. ingress.
you said water, well that can be clean pure water
from RAIN or HVAC evap condensate,
using AC cool or heat + defrost mode? or just pure heat mode?
I do not know what you do there
i tray to capture water,in jar,and see if it is green or yellow or pink
that is AF antifreeze,
and put my fingers in it and rub fingers to thumb and it feels very very slippery, that is AF. not water
if i sniff it and smells sweet it is AF>
(3 ways to discover AF antifreeze)
ok it's water, so dont use AC or Defrost mode.
so that be RAIN or defrost condensart
sorry i could never even guess the water gravity effects from any car made from fire wall to rear of care, gee hills even change that.
learn to do deeper inspection of all carpets there.

bad door gasket
or last drove car with say a bandanna hanging out the door.
a 1 time event,nobody can guess ever.
and allowed rain to go inside any car.
or windows were not fully up.

If the car overheats also, replace thermostat.Could be heater core needs to be replaced, Any water on passenger side floor?, or smell of coolant?or are windows misty on inside of car?when you slide control from cool to heat it is supposed to close a door that lets in cold air, make sure thats working, usually you can hear it shut. lastly, check water pump. You do have enough coolant in system right?

when you operates the heater button worm water of your engine's water jackets enter to the evaporator locates inside your A/C blower & air flows through it & air becoming worm. Therefore I proposed you to check your vent linkages for vent doors inside the blower unit.

when there\'s air in the cooling system it can give a super hot reading because there;s no coolant where the temp sensor is located-when coolant passes over this super heated area it will boil -thus causing the boil over effect-with no coolant in the heater core it will not heat either-try adding coolant -run a little till it gets hot then shut off-make sure there\'x coolant in the over flow bottle as it cools back down it will suck coolant back into the system-don\'t let it run out or it will suck air back in-it will take a few heat and cooling cycles to get the air out. at the shop I work at we use a tool to suck all the air out of the system and then open a valve and the vacume draws the antifreeze back into the system. If you can\'t get the system to take antifreeze you may have a leaking head gasket that is pressurizing the system and blowing out the antifreeze-this could be diagnosed by a mechanic-cheers Denny

This leaking on the passenger side sounds like possibly the water pump. I THINK that this is a cross-mounted engine, with the drive belt on the passenger side. If so, it is almost certainly the water pump leaking. Get a flashlight and a small inspection mirror and search around under the water pump drive pulley for signs of water dripping. If no water is found there, it probably is not the pump. Have you checked the cooling fans for proper operation? Tested the temperature sender that controls the cooling fan?

There is a thermostat in line with the Heating & cooling system of the engine. When the water temperature reaches a determined level, say 240 degrees, the thermostat will open allowing the hot water to travel through a heat ex-changer under your dash board allowing heat inside the car. If this thermostat is sticking closed, it will not allow water to travel to the ex-changer causing cold air to blow. Unless your mechanical ability is fair to good and you have the tools you can change it yourself but even if you take it to a garage it shouldn't be too much to fix. Here's a video you can watch for more information. - https://www.youtube.com/watch?v=VDZM5G-BIi8

check the passenger side fuse panel inside the car there is a little cover that come off to get at the fuses. there is a fuse box outside on the fender passenger side and I think there might be one under the dash where the radio is.

on the passenger side? if it is the passenger side is your heat exchanger carrying the coolant that is used to regulate the cabin temperature. it is under the dash. Usually what happens is that the condenser (heat exchanger) the drain hose coming thru the firewall inside the engine compartment (passenger side) clogs not letting drain the water removed from the cabin during the AC cooling process. then the water start to bleed thru the joints of the box enclosing the heat exchanger. the solution is to blow or vacuum the protruding drain hose to clear the water path.

Now if the soaking carpet smell like coolant the problem is different.

you can find fuel filters near fuel tank under car or close to the carberator under bonnet. Sometimes the easy way to find is to start where fuel enters engine and carefully follow it backwards.Hope this helps.Good luck.

NO heat because there is no coolant flowing throught the heaster core. Car is overheat since there is no coolant circulating in engine water jacket.
Check the coolant, if it is low, then check the oil level. If oil level is high then the head gasket is blown so coolant gets into the engine therefore there is not enough coolant to cool the engine.
If the oil level is OK and coolant level is OK then Need to check 3 following things:
-Bad thermostat is not open causing coolant stagnant then engine overhet.
-Bad water pump is not pumping coolant so there is no coolant circulating to disipate the heat.
-Bad radiator blocks the coolant flow from top to bottom radiator.
Good luck.