View Full Version : Armstrong hwc 18 furnace
02-18-2007, 11:32 AM
The thermostat from my furnace has been changed but the heat in the unit will only get to 60 degrees(thermostat set for 85) but the burners and blower are cycling back on but only stay on for 3 to 5 minutes and then shuts down approximently 30 seconds! Possible that i have a cracked heat exchanger or bad limit? Thanks for any help!
02-18-2007, 11:48 AM
Did you check your filter? Did you put on a digital thermostat or a mercury bulb thermostat?
02-18-2007, 12:33 PM
It is a mercury bulb and I have changed the filter! Thanks
02-18-2007, 01:14 PM
check air flow at coil,make sure there is nothing in the way of duct or blower and then check all limits are passing power
02-18-2007, 02:04 PM
Also need to make sure you set the heat anticipator correctly when ever you put in a mercury bulb stat.
02-18-2007, 05:58 PM
your anticipator may be set wrong since it is a mercury bulb
Powered by vBulletin® Version 4.2.0 Copyright © 2013 vBulletin Solutions, Inc. All rights reserved.