The screen just scrolls through unreadable screens. The first failure, the heat came one and heated the house until I shut the furnace down. It was like 80 in the house. The second time, the heat didn't come on, the last time, I just happened to walk by the thermostat and it was blank. The best I can tell, the thermostat has 2 wires going to a transformer and 2 going to some type of relay that then one wire comes back hand hook to the RED wire coming from the thermostat and then connects to the R terminal. I'm hesitant to touch anything because I don't want to have to pay for a replacement. Thanks for the quick reply.
Honeywell TH8320U and Amana LP Furnace/AC
3 of these thermostats have failed in the last year. 2 were installed by the contractor who installed the system and 1 by a second installer. Both companies are well respected and have been in the business for decades. I emailed Honeywell and they wouldn't discuss my problem.
In any event, I don't think I'm going to attempt to fix my problem but am looking for possible problems that may have been overlooked. I also have a Aprilaire humidifier.
The labels on the board in the furnace are:
O
YLO
Y
B/C
G
R
W
W2
DEHUM
on the back of the thermostat (Conventional Columns) are:
Left side:
Y2
W2
S1
S2
Right side:
RC
R
W
Y
G
C
Can anyone shed some light on this or perhaps let me know if this thermostat is incompatible? When it worked, it seemed to work fine. Thanks
In any event, I don't think I'm going to attempt to fix my problem but am looking for possible problems that may have been overlooked. I also have a Aprilaire humidifier.
The labels on the board in the furnace are:
O
YLO
Y
B/C
G
R
W
W2
DEHUM
on the back of the thermostat (Conventional Columns) are:
Left side:
Y2
W2
S1
S2
Right side:
RC
R
W
Y
G
C
Can anyone shed some light on this or perhaps let me know if this thermostat is incompatible? When it worked, it seemed to work fine. Thanks
1 - 3 of 6 Posts
Thanks. The latest thermostat lasted maybe a week. I have a 2 speed A/C unit outside if that answers your question. Like I said, there is some kind of extra relay or something on the side of the unit that has some fat wires that connect to the humidifier, some of the thermostat wires (either coming from the thermostat or going to the outside compressor) and the control board.
1 - 3 of 6 Posts
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