Coleman model #TG8S080B12MP11A has a code of 7-Ignition lockout?
Hi, with the ignition locked out, you need to go through the sequence of operation on this furnace to find out why its locked out. The chart that's glued to the panel will walk you through the steps to take to find out what safety has failed. Check to see that the HSI ( Hot surface ignitor ) glows. Check the flame sensor that runs along side of the pilot to make sure it is clean. You can use a piece of sanding cloth to clean the tip. Check to see that your roll-out switch has not tripped, if so reset it and find out why it tripped, gust of wind down the flue pipe, flue pipe cover missing from the wind maybe, I don't have the schematic of your furnace but your chart will lead you in the right direction to find the problem. You can also at no charge to you, call your local gas company and just say you think you smell gas and they will be there fast. I have had many people do this and have the problem taken care of for no charge, or told what they can do. Look at the schematic and locate the ignitor and follow from there through the safetys on this furnace to find out why its locked out. The inducer motor should come on first to pressurize the fire box. From there you have a small pressure switch, single pole single throw 24 volt switch that must close before the pilot will light and prove its self. If this doesn't happen, the ignition will lock out after 3 times. Kill the power to reset the unit and turn up the thermostat and watch. If for some reason you loose power when you remove the panel, there will be a panel switch that opens and you will need to tape it closed to get power back on. It is a safety also, located on the panel perimeter. Do these checks and get back to me when you can to update me. Good Luck,
A/C, & Heating Contractor
Oct 17, 2010 |
Coleman Air Conditioners