Mitsubishi L200 cab heater blowing cold air

Car: Mitsubishi L200
Variant: barbarian
Model Year: 2010
Categories: Electrics, ECU, Warnings & Lights
my pick up heater is blowing hot and cold can anyone help real hard to keep the window clear this time of year HEATER NOT SAY HOT HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Posted: Dec 24, 2015 (8 years ago)
Hi it's probably the thermostat not working properly.
Posted Dec 24, 2015 (8 years ago)
If thermostat jammed open it will run cold .If temp gauge normal , check coolant level .You could check the heater hoses where they pass through the bulkhead into matrix and see if hot .Other possible causes if not any of those .
Posted Dec 25, 2015 (8 years ago)
Bit of an unclear question here!
So diagnosis isn't going to be perfect.
But if I understand you the heater in the cab is fluctuating?
What does the gauge read/do,
is it a stable temp?
Is it of the low mark?
Because it sounds like air lock in the matrix,
which could be caused by a low coolant level which you topped up but did not bleed the air out.
Or the worst thing it could be is gas locked from a failing/failed head gasket.
So 1st thing would be to bleed the air from the coolant.
Posted Dec 25, 2015 (8 years ago)
Didn't want to spoil your Christmas , so held back suggesting head gasket and left it under other possible causes .Bleeding cooling system is a good idea and may indicate head gasket if air found but a block test will confirm or not .
Posted Dec 25, 2015 (8 years ago)

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