Question about Heating & Cooling
Is this a heat pump or a gas heater? If it's a gas heater and the blower comes on immediately, you have what's called a critical failure. A high limit has tripped. You need to check the roll out switch and the high limit temperature sensor mounted in the combustion chamber. If you have a stack limit switch, you need to check that too
Posted on Mar 30, 2019
On what, exactly.?
Posted on Mar 30, 2019
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Posted on Jan 02, 2017
The compressor coming on when the contact is pushed is o.k. they all do that. As for the blower fan not shutting off, some brands (Payne for example) the heating fan relay is a n.c. (normally closed ) relay. so if the time delay relay or thermal link are bad or not connected, the fan will blow even when it is turned off.
Posted on Dec 18, 2007
I had the same problem. Try replacing the blower resistor behind the glove compartment. ($59.00 for part at dealership & 20 minute easy job. Two screws at bottom of glove box and two screws on resistor and replace. The blower ($150.00) motor may be causing the resistors to blow. I have already blown two speeds on my new resistor and believe it is because the bottom bearing on the blower motor is a little tight causing it to stick or slow start at lower speeds. No problem yet on high. Probably needs replacing.
Posted on Jul 13, 2008
The heater core was plugged and took 8 flushes to clean it . Would clean it would stop again. Have heat now .
Thank you everyone for helping.
Posted on Sep 20, 2008
you could have air trapeed in the cooling system. If so, go to shop with evac/fill equipment to burp the air.
ALso, feel the heater hose going into the heater core and out of the heater core. They should be hot. They are about 1 inch round and go into the firewall behind the engine.
Is the engine temperature normal? If not, replace the thermostat.
I assume you have electronic system since you said you push a button. Perform this test and get codes
EATC SYSTEM ON-BOARD DIAGNOSTIC TROUBLE CODE CHART Trouble Code Detected Condition Action 024 Fault in blend door calibration during self test GO to Pinpoint Test B . 025 Intermittent fault in blend door calibration GO to Pinpoint Test B . 030 On-Board Diagnostic indicates automatic temperature control sensor shorted GO to Pinpoint Test G . 031 On-Board Diagnostic indicates automatic temperature control sensor open GO to Pinpoint Test G . 040 On-Board Diagnostic indicates ambient sensor short GO to Pinpoint Test C . 041 On-Board Diagnostic indicates ambient sensor open GO to Pinpoint Test C . 042 Ambient sensor intermittent short GO to Pinpoint Test C . 043 Ambient sensor intermittent open GO to Pinpoint Test C . 050 On-Board Diagnostic indicates sunload sensor short GO to Pinpoint Test D . 052 Sunload Sensor intermittent short GO to Pinpoint Test D . 115 Intermittent engine coolant temperature signal GO to Pinpoint Test N or Pinpoint Test P . 125 Intermittent vehicle speed signal GO to Pinpoint Test N or Pinpoint Test P .
Posted on Feb 28, 2010
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