Blower keeps running after a/c has reached set temp

SOURCE: carrier model 58sxa080-gg series 100

the flame detector rod is dirty? try cleaning with sand paper and scraping also. there should be a small amp. reading threw wire coming from flame detector rod. in milli amp range. increases when running. some times i use a jumper to hold gas valve on once started to allow time to test amps.

Marvin

• 85242 Answers
• Posted on Sep 23, 2008

SOURCE: 1995 GMC Sierra Ext Cab

You need to replace the blower motor resistor

Allen Neal

• 359 Answers
• Posted on Dec 17, 2008

SOURCE: Coleman Evcon furnace, blower runs

make sure the thermostat is in the auto mode if so it is more than likely the fan relay control some are built on the board some can be replaced separately

SOURCE: Replacing Blower Motor Resistor

1. Disconnect and isolate the battery negative cable.
2. Open the glove box.
3. Flex both sides of the glove box bin inward near the top far enough for the rubber glove box stop bumpers to clear the sides of the glove box opening, then roll the glove box downward.
4. Reach through the glove box opening to access and disconnect the instrument panel wire harness connector for the blower motor resistor from the resistor connector receptacle (Blower Motor Resistor).
5. Reach through the glove box opening to access and disconnect the blower motor pigtail wire connector from the resistor connector receptacle.
6. Remove the two screws that secure the blower motor resistor to the evaporator housing.
7. Remove the blower motor resistor from the evaporator housing.

SOURCE: blower fan keeps running even aafter the engine is shut off

3 Inspect Thermostat Faulty Thermostat. 4 Inspect Antifreeze Needed Coolant Level Low.