My nest thermostat gives me an E23 error (http://nest.com/e23)
From https://www.justanswer.com/ythi JustAnswer Customer: my nest thermostat just gave me an e23 error (http:/nest.com/e23). JustAnswer Customer: this apparently means there is no power detected on the red wire. JustAnswer Customer: I have taken the thermostat off and check the power across the red and white wires (would that be right?) and there is nothing. JustAnswer Customer: I tried joining the red and white wire to call for heat but the furnace does not light. JustAnswer Customer: I have checked the power to the furnace and it appears to be ok - I can throw the switch next to it and the furnace fan goes off. JustAnswer Customer: When I turn the furnace back on the fan comes back on. JustAnswer Customer: (I'm not sure the fan should be on though, it isn't usually on unless ther heat or cooling is on). JustAnswer Customer: I checked the breaker board and they all seem fine. JustAnswer Customer: I tried resetting the furnace on regardless but it has not helped. JustAnswer Customer: Heating was working fine up until today and now seems just to have stopped working. JustAnswer Customer: My thermostat has a red, white, yellow and green wire only. HVAC Guru: HVAC TECH: You need to check the fuse on the control board on the furnace itself. HVAC Guru: HVAC TECH: There should be a small 3-5amp slot fuse on the main control board. HVAC Guru: HVAC TECH: If that is blown that will give you the issue you are having. HVAC Guru: HVAC TECH: Here is what one looks like. JustAnswer Customer: I cannot find a fuse on my board, assuming this is the board you mean. JustAnswer Customer: Please see the links for pictures, one of the whole of my furnace and one of the board I found. JustAnswer Customer: Whole Furnace Pic Control Board Pic This link is for the manual of my furnace too, in case it is of help. JustAnswer Customer: http:/www.docs.hvacpartners.com/idc/groups/public/documents/techlit/58gs-1si.pdf HVAC Guru: HVAC TECH: Ok thanks for the great pics!.you need to check your power into and out of the transformer next to the board, There are 4 wires to the transformer.2 in and 2 out.120volts go in and 24 volts come out. HVAC Guru: HVAC TECH: see what you have there and you also may have an inline fuse in one of those wires. JACUSTOMER-1er5mzsf-: HVAC Technician: I measured the voltage across white and black (input?) LINE-1 and LINE-2 which was 121 volts. JACUSTOMER-1er5mzsf-: HVAC Technician: I also measured it across PR-1 and PR-2 which was also 121 volts. JACUSTOMER-1er5mzsf-: HVAC Technician: I think they are just part of the same connection. JACUSTOMER-1er5mzsf-: HVAC Technician: The other side of the transformer, the red and blue wires go to SEC-1 and SEC-2 on the top right of the board. JACUSTOMER-1er5mzsf-: HVAC Technician: They are measuring 27.8 volts across them. JACUSTOMER-1er5mzsf-: HVAC Technician: Should there be any voltage on the screw down connectors at the bottom of the board? JACUSTOMER-1er5mzsf-: HVAC Technician: I assume those wires go to my thermostat? JACUSTOMER-1er5mzsf-: HVAC Technician: The red wire should have a voltage at that point should it not? JACUSTOMER-1er5mzsf-: HVAC Technician: I couldn't find any in-line fuses on the transformer wires. HVAC Guru: HVAC TECH: Yes if you measure from the RED thermostat wire to the C connection on the b oard you should have 24 volts there. HVAC Guru: HVAC TECH: If you do then you may have a break in the RED wire to the thermostat. JustAnswer Customer: I have checked the voltage across the red wire (screwed into R) and the white wire (screwed into C) and there is no voltage across them. HVAC Guru: HVAC TECH: Make sure you have your blower panel switch pushed in. HVAC Guru: HVAC TECH: If you do not have voltage there then there is something wrong with the board. HVAC Guru: HVAC TECH: Take the board off and check the conntions and solder joints on the backside. JustAnswer Customer: Yes, I had the blower switch pushed in. JustAnswer Customer: I will check out the board tomorrow. JustAnswer Customer: Thanks for your help so far. HVAC Guru: HVAC TECH: Yes there is an issue with the board as there should be voltage there at those two terminals. Pearl Wilson: Assistant: If you have a home improvement or appliance question and want to chat with an expert now visit justanswer.com/ythi
From https://www.justanswer.com/ythi JustAnswer Customer: my nest thermostat just gave me an e23 error (http:/nest.com/e23). JustAnswer Customer: this apparently means there is no power detected on the red wire. JustAnswer Customer: I have taken the thermostat off and check the power across the red and white wires (would that be right?) and there is nothing. JustAnswer Customer: I tried joining the red and white wire to call for heat but the furnace does not light. JustAnswer Customer: I have checked the power to the furnace and it appears to be ok - I can throw the switch next to it and the furnace fan goes off. JustAnswer Customer: When I turn the furnace back on the fan comes back on. JustAnswer Customer: (I'm not sure the fan should be on though, it isn't usually on unless ther heat or cooling is on). JustAnswer Customer: I checked the breaker board and they all seem fine. JustAnswer Customer: I tried resetting the furnace on regardless but it has not helped. JustAnswer Customer: Heating was working fine up until today and now seems just to have stopped working. JustAnswer Customer: My thermostat has a red, white, yellow and green wire only. HVAC Guru: HVAC TECH: You need to check the fuse on the control board on the furnace itself. HVAC Guru: HVAC TECH: There should be a small 3-5amp slot fuse on the main control board. HVAC Guru: HVAC TECH: If that is blown that will give you the issue you are having. HVAC Guru: HVAC TECH: Here is what one looks like. JustAnswer Customer: I cannot find a fuse on my board, assuming this is the board you mean. JustAnswer Customer: Please see the links for pictures, one of the whole of my furnace and one of the board I found. JustAnswer Customer: Whole Furnace Pic Control Board Pic This link is for the manual of my furnace too, in case it is of help. JustAnswer Customer: http:/www.docs.hvacpartners.com/idc/groups/public/documents/techlit/58gs-1si.pdf HVAC Guru: HVAC TECH: Ok thanks for the great pics!.you need to check your power into and out of the transformer next to the board, There are 4 wires to the transformer.2 in and 2 out.120volts go in and 24 volts come out. HVAC Guru: HVAC TECH: see what you have there and you also may have an inline fuse in one of those wires. JACUSTOMER-1er5mzsf-: HVAC Technician: I measured the voltage across white and black (input?) LINE-1 and LINE-2 which was 121 volts. JACUSTOMER-1er5mzsf-: HVAC Technician: I also measured it across PR-1 and PR-2 which was also 121 volts. JACUSTOMER-1er5mzsf-: HVAC Technician: I think they are just part of the same connection. JACUSTOMER-1er5mzsf-: HVAC Technician: The other side of the transformer, the red and blue wires go to SEC-1 and SEC-2 on the top right of the board. JACUSTOMER-1er5mzsf-: HVAC Technician: They are measuring 27.8 volts across them. JACUSTOMER-1er5mzsf-: HVAC Technician: Should there be any voltage on the screw down connectors at the bottom of the board? JACUSTOMER-1er5mzsf-: HVAC Technician: I assume those wires go to my thermostat? JACUSTOMER-1er5mzsf-: HVAC Technician: The red wire should have a voltage at that point should it not? JACUSTOMER-1er5mzsf-: HVAC Technician: I couldn't find any in-line fuses on the transformer wires. HVAC Guru: HVAC TECH: Yes if you measure from the RED thermostat wire to the C connection on the b oard you should have 24 volts there. HVAC Guru: HVAC TECH: If you do then you may have a break in the RED wire to the thermostat. JustAnswer Customer: I have checked the voltage across the red wire (screwed into R) and the white wire (screwed into C) and there is no voltage across them. HVAC Guru: HVAC TECH: Make sure you have your blower panel switch pushed in. HVAC Guru: HVAC TECH: If you do not have voltage there then there is something wrong with the board. HVAC Guru: HVAC TECH: Take the board off and check the conntions and solder joints on the backside. JustAnswer Customer: Yes, I had the blower switch pushed in. JustAnswer Customer: I will check out the board tomorrow. JustAnswer Customer: Thanks for your help so far. HVAC Guru: HVAC TECH: Yes there is an issue with the board as there should be voltage there at those two terminals. Pearl Wilson: Assistant: If you have a home improvement or appliance question and want to chat with an expert now visit justanswer.com/ythi