My son has no heat in his truck. We have changed theThermostat and flushed out and new anti-freze. At the time I also blew out with a compressor thru the two heater core hoses. Still no heat. The vent damper on the firewall works properly with the vacuum switch functioning to open and close the damper door. Still no heat.
Any help would be appreciated. Thanks
Check your thermostat , start the vehicle , turn heater on full - let vehicle run for a while - then grab the top heater hose - it should be warm if not - replace the thermostat, it may be stuck shut .
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the stuff describe most likely from the anti boil -anti freeze mixture that has become ineffective for not being changed regularly and not up to percentage to do the job. It allows the aluminium parts of the car to corrode and what you see is the end result . It will deposit in the cores of the radiator and block them up resulting in a replacement radiator . You can expect corroded aluminium parts from all areas of the motor.
need more information about :no heat. Do you get anyheat, such as mildy warm from blower? Is there no heat every - not matter how long you drive? if the answer is yes to both suggest you purchase and install a new cooling system component: thermostat. You can pick them up at any auto parts dealer. its a messy job and you will need a bottle of compatible anti-freeze to top up system. Suggestion: if you have never flushed cooling system get that done or do it yourself at the same time (disposal of old fluid to your nearest environmental depot - not any where else.
Just got my 2012 CRV out of the Honda shop yesterday; it blew cold air out the vents while the engine was completely warmed up.
Honda has a service bulletin on it; the heater core must be flushed several times (there's a flush kit that Honda has provided).
After the flushing, I had all the heat I ever needed.
The REAL problem is this: Honda or the dealer can't tell what the cause of no heat. Is it corrosion/air pocket/bad anti-freeze???
Asked the dealer to inspect the bottom of the bucket when they flushed it if there is debris. "Well, the water is swirling around the bucket, so we couldn't see any debris".
Did you bleed your system of air???....usually a bleed screw near the thermostat housing...get allllll the air out...simetimes the heater core is at the highest oart if the system..therefore if there is air in system..thats where the air settles and no coolant will flow through the heater cire!!
i just went through this in my 2001 F250. first check to see if you have flow switch in your heater hoses. this opens and closes to let hot water in your heater core. mine did not have this, but here is what my problem was. i had used that pink antifreeze. it slimmed up in the heater core. i blew air through the core and un plugged it and had heat. it was hard to get that stuff out as i flushed the system 2 times and put in green antifreeze. in desperation the 3rd time i blew air through and got it clean and that was the end of my heat problem.
The problem is the fan. The actual fan just behind the radiator.
They have a "clutch" that;s replacable so don't buy the entire fan AND clutch.
A simple test is, spin the fan blades with the engine off of corse. If it spins rather fast, that's the problem. It SHOULD have some resistance and stop quickly.
You most likely have a clog in the heater core. Did you hear a sound like running water under the dash on the passenger side at one time? If so, it's almost certainly a clogged heater core. The problem is that the orange antifreeze clots. It should be changed more often than recommended.