Question about Heating & Cooling
We have an older furnace a Mac 2254 and have no heat how do we fix it
Posted by Anonymous on
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Posted on Jan 02, 2017
If it is just the computer that isn't ejecting the disk (and not a physically "stuck" DVD) there is a way to force eject.
Go to Apple menu > Restart and hold down your mouse button until the disk ejects.
Or you can try the firmware method...
If all other methods fail, you can try to eject the disk using the firmware (this may not work on all computers). To use this method, start up and briefly use the computer with only the firmware loaded, not the standard Mac OS X interface.
To eject a disc using firmware:
Restart the computer.
When you hear the startup sound, press and hold the Command-Option-O-F keys. (The Command key has an Apple on it.)
Release the keys when you see a white welcome screen.
At the prompt, type:
Press Return, then wait a few seconds. The disc drive should eject the disc, and "ok" appears on the screen when the action is complete.
Your computer starts up normally and you see the familiar Mac OS X desktop.
Posted on Apr 16, 2009
You could use virtual box ( unless you want to purchase vmware fusion or parallels ) to run windows or you could use boot camp on one of or both of the macs to run the software
Posted on May 17, 2009
THIS IS A COMMON PROBLEM WITH THE DOOR SWITCHES, MY FIRST ANSWER WOULD BE REPLACE THE SWITCH SECOND WOULD BE OPEN THE DOOR AND PUSH THE BUTTON IN AND SEE IF THE FURNACE WILL WORK. THIS SWITCH IS JUST A DOOR SAFTEY IF THIS WORKS. I HAVE TAPED A PIECE ON THE INSIDE OF THE DOOR WHERE THE SWITCH WILL HIT THE DOOR ABOUT A 1/4 INCH THICK AND SEE IF THIS WILL GET YOU RUNNING UNTILL YOU CAN GET A SWITCH
Posted on Oct 12, 2009
If when you turn the heat on you hear the furnace fan start up (exhaust fan) then the problem is NOT the Thermostat....need some more info on the furnace...the Wiring in the thermostat should include a Jumper wire between RH & RC if you have 4 wires and no jumper required if you have 5 wires
Posted on Nov 01, 2009
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