What does the red light indicate on the Acurite 00837 thermometer remote?

The book for that unit is here: http://www.acurite.com/kbase/search/query/00754/

I cannot find your model L50668TX thermometer on Acurite's website. That said, you can search available product manuals here:
http://www.acurite.com/kbase

Alternatively, if you still need more assistance/User Manual information, you can contact them with these details:

Website: http://www.acurite.com/support

Customer SupportTel: (877) 221-1252
Mon - Fri: 7:00 a.m. - 7:00 p.m. CT
Sat - Sun: 8:00 a.m. - 4:00 p.m. CT (Oct - Feb)
Wholesale(866) 249-1045
Mon - Fri: 8:00 a.m. - 5:00 p.m. CT
Mailing Address
Chaney Instrument Co.
965 Wells St.
Lake Geneva, WI 53147
Email: [email protected]

get the model and make of ur product go online to that website and request a manual.

It is the outdoor sending unit for and indoor/outdoor thermometer. I have had one for years and am looking for another one.

I have misplaced the user manual for the
Acurite L5C0668TXACU RITE Wireless Thermometer Model L5C0668TX. Where can I get another?

outside temp

HH means it is showing the high temperature you (most likely accidentally) set with the MAX MIN / + button, which is easy to do when setting the clock. Just press that button again until the reading appears.

I am skeptical of the "radio Interference" answer. The symbol on the lower left-hand of the panel indicates that it has received a signal from the sensor. My Receiver stops beeping if I stand between sensor (00739) and receiver (00734?). Perhaps they are too close. It took nearly a week for the sensor to indicate or transmit after Irinsed the battery compartment.

The manual is at http://www.acurite.com/manuals/00604A1-instructions.pdf

To turn the alarm on and off 1. press the alarm button momentarily. 2. Press the "+" button momentarily once or twice. The alarm indicator (looks like a bell) to the left of the time numbers will change from on to off.

This is a link to your manual:

AcuRite 75321A1 Instruction Manual

Dave