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D.E. Anderson
D.E. Anderson, Industrial Refrigeration Service Manager
Category: HVAC
Satisfied Customers: 146
Experience:  15 years experience. Design, install, service of residential & commercial hvac/r equip.
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I have a similar issue where I was replacing a working

Customer Question

I have a similar issue where I was replacing a working thermostat with a nest thermostat and the nest thermostat states there is no power to the Rh wire. I replaced the blown fuse and now the fan is working but the furnace will not kick on. I've checked breakers and it doesn't appear to be any tripped breakers.
Submitted: 12 days ago.
Category: HVAC
Expert:  airheatman replied 12 days ago.

Turn power off to furnace and back on.The if it does not come on yell me what wires are connected where on the Nest

Customer: replied 11 days ago.
I just turned off the furnace and turned it back on. Blower is running but the furnace doesn't seem to be heating. I've attached a picture of the wires
Expert:  airheatman replied 11 days ago.

Can you give me complete model from inside furnace in burner compartment so I can provide guidance with this specific unit.Model will be on a label just above burners on right or left inside panel

http://i.imgur.com/U8b0GXT.jpg

Then look in blower compartment and see if we have a control board with a blinking light.If so tell me the pattern of that flash.That will indicate what is wrong and tell us where to start troubleshooting.

Customer: replied 11 days ago.
I took off the top cover to get the model info and the burners are lit, see pic
Customer: replied 11 days ago.
Model Info
Customer: replied 11 days ago.
No blinking light on control board, solid red
Expert:  airheatman replied 11 days ago.

OK I am ntr understanding.Question stated furnace will not work

Customer: replied 11 days ago.
The thermostat will not work, the furnace wasn't working but I switched out the fuse and now the blower is working. The air blowing out of the registers is not hot like I would expect it to be since the burner appears to be running
Expert:  D.E. Anderson replied 9 days ago.

Hi do you still need assistance with this? Thanks

Customer: replied 9 days ago.
thermostat still says it doesn't have power to the Rw location.
Expert:  D.E. Anderson replied 9 days ago.

Ok, is it still wired as shown in the picture?

Expert:  D.E. Anderson replied 9 days ago.

Trying to get up to speed with the progress made by the previous technician

Expert:  D.E. Anderson replied 9 days ago.

Do you have a volt meter available to take measurements?

Expert:  D.E. Anderson replied 9 days ago.

Thanks

Customer: replied 9 days ago.
Customer: replied 9 days ago.
No but I used a meter to tell me that the red wire has a current but I don't have a meter to measure how much current
Expert:  D.E. Anderson replied 9 days ago.

Alright, if you disconnect the red wire from RH and the white wire from w1 and twist them together, does your furnace run?

Expert:  D.E. Anderson replied 9 days ago.

Let me know, and then if it doesn't, then I will walk you through checking some connections at your furnace with the volt meter Thanks

Customer: replied 9 days ago.
Thanks, I'm not at the house now but I will be tomorrow so I'll check that out and let you know. Thank you!
Expert:  D.E. Anderson replied 9 days ago.

Alright, Doing that will isolate if our issue is at the thermostat or at the furnace. Just let me know. Thanks

Customer: replied 9 days ago.
Thanks, ***** ***** the house now
Expert:  D.E. Anderson replied 9 days ago.
Alright thanks
Expert:  D.E. Anderson replied 8 days ago.
Hi, have you made any progress?

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