Question about 1988 Toyota Pickup

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Toyota dyna 1988 double cab ute heater not hot

Heater blows good as but there is next to no heat, is it an element problem, if so where is it?

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Check to see if your coolant is full, if it isnt fill it first, then check to see if your thermostat opens properly by feeling both heater core hoses after engine warm up....both hoses should be hot.......if not, a stuck thermotat or plugged heater core is the problem
...good luck,,,marty

Posted on May 22, 2009

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Posted on Jan 02, 2017

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Why would my fan blow but not blow hot air?


Locate the heater hoses and feel for temperature.Should be warm to the touch.
There may be an external heater control valve next to the firewall that is either vacuum or cable controlled.
the lever on the side opens and closes: warm coolant going into the heater core,inside the cab. If the valve is stuck,no heat.
If the vacuum to the valve is ZERO,it should open.
If the heater control vacuum hose is leaking air,you should get hot air ALL of the time.
people in the winter want heat NOW. Bypass the heater valve,under the hood with a section of copper or plastic tubing.
Even if the heater core is partly plugged up,you will still get some heat.
If the control valve is stuck closed: NO HEAT.
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After replacing timing chain in 89 toyota 22-re my heater hasn't blown very hot air. I've changed thermostat and flushed coolant lines. I used to have an awesome heater but now when I turn blower full...


yes a bad water pump will cause it not to circulate the coolant through the heater core,find your coolant leak 1st is it leaking into the cab on the passenger side of your truck? thats another sign of a bad heater core also.make sure that you don't have an air pocket in your cooling system.it has to be full for the heat to work properly.thank you for choosing fixya.com

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check the temp of the heater hose going into fire wall,make sure they are both the same temp,if they are replace the thermostat.
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