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Sedans Buick LeSabre Buick LeSabre Heating / Cooling
100 messages, Last post on Nov 12, 2009 at 7:48 PM
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1994 Buick LeSabre Custom AC/Heater Fan will not work.Manual control system. We took out the inside control the fan will not work. Mechanic had an old one from junk yard the fan worked but no other buttons worked on that unit, I bought a new fan control switch we put that in and it still did not work! All the lights light up on the control except the fan control. What can the problem be???
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Replying to: billnmd2006 (Dec 01, 2008 5:40 am) You really need to see a factory service manual. If you have a library that's part of a fairly good one, call to see if they have AllData on their library computers. Our county-wide system does, but it's not accessible from home computers like most of the databases and info services. I have to go to the local branch and use their terminal. I can save pages and pictures onto my USB memory stick. I can print out things there if I want. You can buy factory service manuals used that are authentic Helm GM manuals on Ebay, but you need to do some comparisons from year to year and seller to determine what's the real appearance of the Helm manual for that year. They are available new form helminc.com for about $125. You need to find out where power for the buttons is supplied through what fuses and relays. |
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Hi, This past summer I had to replace the manual AC/Heater Control Unit C-60 with rear window defogger switch. I found a used one on ebay. I finally had AC but now I find that the defrost isn't that strong or hot and the defogger switch doesn't work. My heat works fine. I know that the control panel only controls the fan, but did the mechanic do something with the temperature or is it just an old car wearing down? I am having a hard time finding info and was told that I can replace just the defogger switch and that it plugs into the new controls. Is this correct and do you have a part number or photo? Or do I have to replace the whole thing again? Since the parts are no longer available, no one seems to be able to find part numbers on computers. Hope you can help me. Thanks. |
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I have been having heating problems all winter with the heater. It will blow hot air when it wonts to then right back to cold and back and forth.My heater fan is fine. I have flushed to heater core, put new thermostat in changed the coolant nothing helps. My ignition switch was acting up the car wouldn't start some times ma by take 50 trys and then start. I instiled new crank sensor not the problem. So I had a new key made $21.45 so that fixed the cranking problem. I cant figure out the heating problem. I have worked on my on cars all my life 35 years now days thy are getting complicated.
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Replying to: Michael8087 (Feb 13, 2009 10:45 am) Which HVAC system does it have? Has the water pump been replaced? Which type of coolant has been in it? When it's running and the fan is on HIGH, and you touch both heater hoses next tot he firewall, are they nearly the same temperature or is one noticeably cooler? |
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How many miles on the car? Yes Which HVAC system does it have? I dont know Has the water pump been replaced? Not by me, the car dont get hot Which type of coolant has been in it? Regular antifreeze When it's running and the fan is on HIGH, and you touch both heater hoses next tot he firewall, are they nearly the same temperature or is one noticeably cooler? Yes. I have flushed the heater core nothing came out but clean water. I replaced the thermostat put in new antifreeze. The heather will blow hot air for a little while then right back to cold and keep doing this. Sometimes it will stay warm for a good while then right back to cold air. Thanks for any information. Michael * digg * delicious * stumbleupon * netscape * addthis |
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I for got 177,000 miles
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Replying to: Michael8087 (Feb 17, 2009 2:07 am) Which HVAC system does it have? Does it have a digital readout with numbers? IF so, the actuator motor that moves the temperature vanes inside may be broken and moving the vanes that direct how much air goes over the heater core wrong. Has the water pump been replaced? The water pump may have not be working well due to corrosion of the vanes. Which type of coolant has been in it? If it had DexCool in it and it had not been changed every 2-3 years or someone added the old type green antifreeze, the DexCool may have been deteriorated and it forms a sludge that can block things. When it's running and the fan is on HIGH, and you touch both heater hoses next tot he firewall, are they nearly the same temperature or is one noticeably cooler? This is a symptom of a clogged heater core or poor circulation. One thing is that you might have an air pocket in the heater core. After draining antifreeze, when car is at full temperature after being driven 10 minutes or so, run the motor at 2500 rpm for 10 seconds, idle, then repeat up to 5 times. This will move the air out of the heater core. Check to be sure coolant in the radiator is at full level up to the cap. |
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My heater suddenly only blows warm air. Sliding the temperature control to cold does nothing. Where do I start troubleshooting this? Thanks for your help.
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Replying to: sprinterpa (Mar 21, 2009 11:37 am) Either way you're looking under the dash for an actuator arm that moves a vane inside the heater box. Take off the hush panel under the passenger side. I suggest taking off the glovebox door with about 5 more screws on the hinge. You'll be able to see this link title and you're looking for white arm on top of the box, I believe, if it's manual. If it's automatic it has that arm for the driver and the lower arm for the passenger. the lower arm comes out just to the right of the bottom screw marked by two red lines in picture. Look for both of these arms to move if you turn key ON and change the temperature settings and wait a few seconds> BTW if auto, does the passenger temp change when pressing buttons on the passenger temp control?
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