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Question: I have an older Toyota pickup that has no heat. I have changed both the radiator and thermostat. The antifreeze proportions are correct. The system has no heater core leaks or any other leaks. Where do I go from here?
RJ Haskins
Answer: Check the operation of the heater valve to make sure that it opening and allowing coolant to flow through the heater core. Make sure the heater core is not plugged or restricted internally. Check the ducting inside the truck to make sure that air is flowing across the heater core. Check for debris blocking airflow, such as leaves, rodent nests etc. Please write back and let me now what you found.
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