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gotoman for ac
gotoman for ac, HVAC Technician
Category: HVAC
Satisfied Customers: 5000
Experience:  51 years of experience install design and repair of all makes and models of AC
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I have a nordyne(intertherm) central heat and air unit model

Customer Question

I have a nordyne(intertherm) central heat and air unit model number E2EH-015HA. My inside unit only works when the fan is on and not in auto. The outside compressor runs constantly. I have to shut on and off the breakers to have ac. I have no heating control. I have replaced the sequencers and thermostat. The unit apparently tried to freeze up last fall; so I shut it down. The outside unit was running when I came home and the inside unit was not. I also replaced the relay on the unit. I am still stuck in a rut. No AC or heat. I am open to suggestions.
Submitted: 5 years ago.
Category: HVAC
Expert:  gotoman for ac replied 5 years ago.
Did you replace compressor contactor. Russ
Customer: replied 5 years ago.
No. I didn't think about that. I just concentrated on the inside since it wasn't working.
Expert:  gotoman for ac replied 5 years ago.
Turn power off to inside unt and if the outside keeps runn ing contactor contacts are welded. Russ
Customer: replied 5 years ago.
Okay. I am going to have to replace the contactor. I lightly broke it free. There were a few burnt areas on it. I still have the problem of the inside unit. The only way that I can get it to run is in fan and not auto. I am open to suggestions.
Expert:  gotoman for ac replied 5 years ago.

When you turn to cool does outside unit come on without fan. Rfuss

Customer: replied 5 years ago.
Yes. The outside unit runs without the fan when the switch at the inside unit is in auto.
Expert:  gotoman for ac replied 5 years ago.

Do you have terminal board on furnace with W Y R G C. Is the Y to thermostat connected to Y at terminal board. What is model number of thermostat. Russ

Customer: replied 5 years ago.
The terminal board behind the thermostat has W Y R G. There is an O/B terminal. Not a C terminal. I have a blue wire that wrapped up with electrical tape with the other wires, but it has never been used since I have owned the house. The thermostat is a Honeywell RTH221B.
Expert:  gotoman for ac replied 5 years ago.
Just pulled manual on thermostat. Do you have R to Rc jumpered. On back is the heat switch to HE. Russ
Customer: replied 5 years ago.
No. I do not have a R to Rc jumpered on this thermostat. There is only a R terminal the heat switch is on HE. The heat doesn't come on either.
Expert:  gotoman for ac replied 5 years ago.
On the manual I have with thermastat rth221b it shows an RH and RC. They must be jumpered for correct operation. Russ
Customer: replied 5 years ago.
I'll look to see what I am over looking in the instructions. Sorry about the delayed answers. I work graveyard shift.
Expert:  gotoman for ac replied 5 years ago.
No problem I m here for another three hours. Russ
Customer: replied 5 years ago.
I tried a different thermostat I purchased prior to the Honeywell. It is a Filtrete 3M-22. I have gotten the samr results. The fan does not come on in auto, only in manual at the iside unit itself and the heat does not work at all.
Expert:  gotoman for ac replied 5 years ago.
Do you have a wirnig diagram for furnace. Russ
Customer: replied 5 years ago.
Yes. I have it saved on my computer. I was just looking at it.
Expert:  gotoman for ac replied 5 years ago.
Grey common white heat correct, Russ
Customer: replied 5 years ago.
Yes.
Expert:  gotoman for ac replied 5 years ago.
At the furnace if you jumper R to W does heat come on. Russ
Customer: replied 5 years ago.

Looking at the diagram and the actual wiring, R goes to the transformer and W goes straight to sequencer. I jumped a wire between the wires but nothing happened.

Expert:  gotoman for ac replied 5 years ago.
Then the sequencer must be wired wiring or there is an open in the circuit. I know it is a small space. But check across sequencer for 24 volts. Russ
Customer: replied 5 years ago.

Okay. It may take me a little bit. I've got to get my meter to check it out. I'll try to give you a reply back this evening.

Expert:  gotoman for ac replied 5 years ago.
No problem I will be here till 9:00 ct. Russ
Customer: replied 5 years ago.
Okay, I checked the circiuts at the sequencer. I found out that I had some of the wires wrong. They are in the correct places now. I do have heat now. The blower comes on with the heat too. I still have a problem with blower not coming on with the AC. I am open to any more suggestions that you may have. I firmly believe that I am close to a resoluton.
Expert:  gotoman for ac replied 5 years ago.
Good man you are close. JUmper between the two R terminals and set to HE. If you replaced rely check to make sure the G wire is wired to correct terninak at unit, Russ

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