The heater kicks on but only blows cold air
You need to check both heater hoses for circulation when the engine is warmed up and the heater is set for heat. If both hoses are equally hot, water is circulating. This means the heater core and water valving are delivering heat. You would then look for ductwork problems that are failing to route the air under the dash past the heater core.
If the heater hoses under the hood are not equally hot, then you would check to see if the water flow valving is working and what is preventing the flow. In worst case scenario, the heater core is blocked. Try disconnecting the heater hoses and using a garden hose to verify a blockage. Reversing the flow could also clear a blocked core.
Finally, some Digital Climate controls have a diagnostic sequence which can be activated to self-diagnose some problems. This is more difficult to obtain this info because you need the matching Codes to decipher the results. Dealers would have this info.
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Jan 03, 2013 |
1995 Ford Thunderbird