Intertherm Furnace Troubleshooting Manual
On some of the mobile home style furnaces, the door itself should be louvered for return air to enter the furnace. If so, look and you should see provisions for holding the filter in the door. It may be missing a long spring or other type of clip to retain it though. If it is a gas furnace the flu pipe should come out the top, look on either side of the flu pipe for a door or pair of doors with a little sheet metal handle. If so, remove and look inside to see if there are provisions there. Also iIf there is no louvered door, sometimes the filters just rest on top of the furnace. Not a good deal if so.
Feb 15, 2015. Is the burners coming on and then shutting off. And then it starts all over again?? If it is then most likely it is the ignitor/flame sensor. Make sure the sensor is in the contact with the flame. Also if the burner has a lot of rust on it clean it off with a steel brush it acts as the conductor for the ground.
The ignitor is also the flame sensor. When burner shuts off like that, see if gas valve is still getting 24-28vac at the GV terminals. If not, then the problem is electrical and/or safety issue. Dec 08, 2013. Number of flashes mean different things for diff models.
The meanings of those flashes should be posted somewhere on the unit; usually inside front of the bottom service panel. Though you can't truly diagnose a problem by number of flashes they can give you an idea of where to look for a problem. There are a ton of videos and how-to's about furnaces on youtube by real service techs. Most modern furnaces have basically the same set-up and features so don't worry about your paticular brand; but of course that would be the best place to start looking. You could start here to familiarize yourself with your brand of furnace: And then here: Hope this helps. Dec 21, 2012.
Check the air coming from the blower. Is it hot or cold? If it's blowing cold air, then the temperature control switch is broken and needs to be replaced. If it's hot, then the burner is still lit, and stopping the blower while the burner is still lit is dangerous.
Set the thermostat to OFF. If the blower doesn't stop, find the breaker controlling the Nordyne Mobile Home furnace and throw that breaker. The burner should shut off, followed by the blower.
Turn off the gas line running to the furnace in the meantime. Because the blower didn't stop when the thermostat was set to OFF, this means that there is a wiring problem somewhere within the furnace. As the wiring is quite extensive, it's best to call a professional at this point. If the furnace turns on and off frequently, but otherwise works without incident, it's trying to heat the home while working within the constraints that have been set for it. The thermostat has a timing mechanism which will turn the furnace off if it runs beyond a set length of time. This timing mechanism, called an anticipator, needs to be adjusted.
Nordyne Furnace Troubleshooting Manuals
Remove the housing from the thermostat and look for a small slide or lever. Typically the lever has a metal arrow pointing to a scale set in the thermostat, running from 1 to 6. Move the lever over to a 3 or 4, higher if the lever is already on these numbers.
Lennox Furnace Troubleshooting Manual
This will allow the furnace to run for longer cycles, instead of the short cycles it's been trying to make do with. The furnace should run normally now. The Nordyne Mobile Home furnace has an electric ignition set instead of the standard gas pilot that must be lit. Start by pressing the Test switch on the pilot; you should be able to see a blue spark created by the igniter, which extends out over the burner. The sparking should last for about 5 seconds, if it lasts a much shorter length of time, or if it doesn't spark at all, the igniter must be replaced. If the igniter is working normally, but the burner doesn't light, then the flame sensor sticking out over the burner is broken and needs to be replaced.
This should take care of the problem.