Search Articles

Select a Category

Stock Quotes

DIA163.72  chart-0.16
NASDAQ4094.598  chart+8.372
S&P 5001864.49  chart+2.18
^TNX2.715  chart+0.078
BIOS7.1999  chart-0.2701
JNK41.2301  chart-0.0599
TIP113.05  chart-0.17
000001.SS0.00  chartN/A
SLV18.86  chart-0.02
PPLT140.16  chart+0.1399
GLD125.042  chart-0.498
IWM112.58  chart+0.22
IDT16.37  chart+0.44
DGX59.50  chart-0.48
DBD39.57  chart-0.12
CPB44.48  chart-0.20
MYGN37.655  chart-0.675
VE19.9274  chart+0.1574
JVA6.80  chart-0.10
KO40.49  chart-0.10
DDD47.87  chart-0.92
AEO10.985  chart-0.265
AVP14.355  chart-0.425
PEP85.165  chart+0.395
ISRG411.20  chart-3.93
SAFM82.495  chart+0.755
JNJ99.16  chart+0.41
BSX13.46  chart-0.04
EWC29.92  chart+0.09
BP48.69  chart+0.30
HRL47.66  chart-0.04
KTOS7.37  chart+0.06
HD76.99  chart+0.41
SI134.5585  chart+0.4485
APH93.78  chart+0.40
NYX0.00  chartN/A
UPS97.82  chart+0.47
NVDA18.52  chart+0.03
WM42.013  chart-0.147
GRMN56.19  chart+0.37
MKC70.65  chart-0.48
2014-04-17 12:35

The Daily Dilbert

Trane Furnace Open High Limit Device


Trane XR80 furnace did not produce heat. LED indicator inside its access panel blinked 4 times. Trane’s manual indicated “Open High Limit Device”.


The high limit device is the furnace temperature limit. It shuts down the furnace when its burner reaches high limit. Under normal temperature, it should be close to allow power pass through it. The high limit device is in the furnace section above the control section as shown in the picture below.

Trane High Limit Device

Trane High Limit Device

The component can be removed by loosing two bolts. You can check it with a multimeter. The two wire connectors should show less than 10 Omega under room temperature. If it measures open circuit at room temperature, you should replace it. You can purchase it from a reputable vendor. My vendor told me this component fails frequently.

Trane High Limit Device Component

Trane High Limit Device Component

VN:F [1.9.22_1171]
Rating: 5.0/10 (1 vote cast)
VN:F [1.9.22_1171]
Rating: -1 (from 1 vote)
Trane Furnace Open High Limit Device, 5.0 out of 10 based on 1 rating

Comments are closed.