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Q: heater does not get warm or hot blows only cold air on 1993 Mazda Navajo

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
heater does not blow warm or hot only cold
(1) Answer
Check that the heat control cable actually works the blend door in the heater enclosure for m the control lever.. If that's OK, then check to see that the heater hoses are both gettiing hot. If only one gets hot, the heater core's pluigged. You may be able to flush it. or you may need to replace it. last, be sure the engine's getting up to temperature, it should get to about 195F degrees warmed up. If not, it may need a thermostat. Use a 195F degree stat.