Nordyne electric furnace. T-stat replaced last year. Fan comes on when set to auto in A/C mode but fan will not come on when t-stat is set to heat. Is this a bad sequencer or fan relay. This is a Nordyne E2EH-015HA model.
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
It may be but the fan control may be set to turn off at to high a temp, or theres a short between ;r; and g at the stat or furnace or sequencer, IF it runs through it. A limit or rollout switch may have failed but this will keep the unit from firering. Check for a manual blower switch that may be on. At stat it should be at auto and alsso at the fan control. A stuck relay is always possible,
On newer furnaces the fan starts in a period of time factory set and is initiated by the control board. The air conditioning fan is started by the thermostat and starts right away when the stat calls for cooling. You will need a tech. familiar with this model and carrying the right parts to look it over. Does the furnace fire and then shut off in a few minutes? If so, it is most likely to be the board. Sorry. It may be pricy.
Electric strips have what's called a Sequencer also called a stack relay it's a relay that brings on the fan and strips at the same time on a call for heat. If you have more than 5kw you will have more than one Sequencer in fact you will have one for every 5kw.(only the first one will bring on the fan) It could be your high limit making your unit stop heating before it reaches the temp set on the T-stat. Check and see if your getting proper air flow across the electric strips your filter could be dirty. If not remove the cover from your T-stat and take the red and white wires off and twist them together this will bring on the heat then just watch the unit for about an hour if no problems then you have a bad T-stat. If the unit does cut off and the fan seems to be blowing fine you might have a bad high limit switch.
The filter will go in to the backside (inside) of the cover with fins in it. There is a 1" (approx) bend (lip) there to hold filter in against backside of cover, in front of air vents. You may have to bend it slightly to get it in there but it will eventually fit in there snug. Incoming air will then be filtered as it is drawn through that filter, into blower area. As far as fan switch goes, "auto mode" will be used when furnace is on, and fan will come on & off as necessary to dissipate heat as required. "Ventilate", should be basically same as "On", where the fan comes on to circulate the air throughout the home, just for airflow, and you control it manually. So, when using furnace, have fan in "auto Mode".
On a Trane furnace the fan realy must energize before the electric strips will come on. On the thermastat. See if there is setting for electric heat. This will bring the fan on and the strips should come on. First just turn on your heat and and turn fan to on postion if it works you need to set tstat to electric heat mode. Most of the time there is sswitch in the back of the stat that says gas elec. Turn to electric. Rus
The model of T-stat you gave comes up as a discontinued model on Honeywell's web site, but it looks to be a manual stat that type of stat would have to be wired with a summer winter switch with electric heat, allowing it to turn on the fan with a call for heat. If yours is a programmable T-stat you would need to select electric heat or in the installers set up change the default setting for fan from unit controls fan in heat to thermostat controls fan.
You have a blower relay in the furnace that's probably bad. In the heat mode the blower is on a temperature relay, in cooling mode the blower has to come on immediately so there is another relay for cooling. The green wire on the thermostat feeds that relay, so if you go to the furnace and shut the power off and find the green wire from the thermostat that feeds that relay and replace it, being careful to mark all the wires before removing them, also the relay terminals have numbers for identification.
You need to check the low voltage side to see if the t-stat is calling for heat. If it is, it is either the sequencer or a fuse to the heating elements (older model). But most likely the squencer. If you have a meter, you can check to see what side of the sequencer is burnt. Could also be a relay depending on the model number. If you get me the model number, I can send you a copy of the wiring diagram for the unit. This is the brand that I deal with.