Cadillac Repair: 1989 Cadillac Deville, heat sensors, engine coolant

Question
QUESTION: I have replaced the Climate Control Module and still cannot get heat only occationally. Are there any heat sensors and if so where would they be located. Thank you for your help.

ANSWER: Did you adjust the module (PROGRAMMER) correctly ?. Check the heater hoses going thru the firewall into the heater core. One should be EXTREMLY hot and the other slightly cooler.

Thermostat stuck wide open ?.

Low engine coolant in radiator ?.

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QUESTION: Thank you for your response. How do you adjust the module (programmer) Correctly? Are there any heat sensors and if so where are they located? We are now able to get heat but no air conditioning. If it goes down into air conditioning it will not go back up to heat without a lot of trying.

Answer
what you need to do is remove the metal rod that is located on top of the AC/HEATER programmer and put the system of full heat and the plastic programmer arm should come towards you. Wait 3 minutes and pull the threaded rod all the way towards you and snap it in the clip on the programmer.