If temp guage is normal but no heat in cab your heater rad may be blocked or the control flaps not directing the hot air properly ,,, older cars had a heater tap that controlled the hot water flow into the heater radiator ,,,,
SOURCE: Heater Problums with the smell of burning Antifreeze.EXTRA Detail
Hi!
I really feel you could be losing a small amount of coolant from the heater matrix/core.
It
appears we have an Air lock scenario due to this and you will need to perform a
system Bleed.
Park
the vehicle on level ground, when cold remove coolant filler cap,
start engine and leave to idle, turn heater on full and blower to
max. When engine reaches operating temperature watch and listen near
coolant filler, keep clear as gurgling and hopefully a boil over
should occur. Top up with very warm coolant and wait as it may do it
again.
Check
for heat inside vehicle if warm replace coolant cap but keep an eye
on temperature gauge as the ~Air lock may have moved on from heater
matrix/core so proceedure needs to be carried out again from COLD.
Also with your temp gauge reading 1/2 this is normal, possibly the core is blocked or as already suggested leaking, a Radiator sealing additive might help BUT it may be the cause of your cold/warm air?
TOO MUCH SEALER blocking the Matrix/Core?
I hope all this helps!
Please
press the Blue button to appraise my FREE Efforts, Thank You!
Paul
'W' U.K.
SOURCE: intermittent problem starting car when hot
need another car side by side and swop bits over till you hit whatever is causing the problem,my suggestion is a sensor but what one??
SOURCE: Problem with air conditioning on 2001 mitsubishi mirage.
the air conditioning system has most likely drawn moisture this is not good take it to have the system recovered and a new restrictor valve put in. leak checked and recharged
SOURCE: A/C promblem
try driving around for almost 4 months and the damn thing wont blow cold. try spending thousands of dollars and it still being broken. and trying driving in florida in upwards 115 degrees with no cold ac everyday. you only have to wait 30 minutes? count yourself lucky!
Is the engine getting up to temperature?
If so, then the issue is with the interior heater system.
Check or change the interior thermistor.
If this doesn't help, then replace the climate control computer/control box.
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