Lacross 8117it won't display outside temperature

Have you changed the batteries on the outside sender unit?

if the number 6 blinks 4 times it indicates abnormal operation of the outdoor unit.
the way this system gets feedback from the outside unit is via the thermistor i would start there.
here is a manual it might help you troubleshooting what the problem is with the outside unit.
Best of Luck

It could be the coolant temperature sensor is reading wrong. You can verify this by having a live data scanner hooked up to see what it is actually reading.

my truck won't start when it's cold outside. but when it's warm it start's right up I changed the oil and filter and the battery is new what's wrong.

Please check the following website for all the info and faq.

http://skyscan.info/content/index.php?option=com_content&task=view&id=35&Itemid=40

Also,

If you have lost the outside temperature on the clock display after replacing the transmitter battery then do the following:

1. Make sure you have good batteries installed in the remote transmitter
2. Remove the batteries from the main clock and keep them out until the clock display disappers.
3. Re-install the batteries in the clock.
4. Wait until the display returns and includes the outside temperature display as well.
5. Set the clock again for current time/date etc.
6. Bingo. You are in business.

Please check the following website for all the info and faq.

http://skyscan.info/content/index.php?option=com_content&task=view&id=35&Itemid=40

Also,

If you have lost the outside temperature on the clock display after replacing the transmitter battery then do the following:

1. Make sure you have good batteries installed in the remote transmitter
2. Remove the batteries from the main clock and keep them out until the clock display disappers.
3. Re-install the batteries in the clock.
4. Wait until the display returns and includes the outside temperature display as well.
5. Set the clock again for current time/date etc.
6. Bingo. You are in business.