Control Company 4115 RADIO-SIGNAL REMOTE THERMOMETER - Manual (Page 17)

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On occasion, momentary interference with the remote transmitter may
cause an erroneous minimum or maximum reading to be captured by the
main unit.
If two or more remote units in the same area are set to the same chan-
nel then any or all main units will probably receive scrambled signals and
report erroneous readings.
If the units do not perform when placed further apart, then try the following.
1. Place the remote transmitter unit as high as possible.
2. Place the remote transmitter in a vertical or stand-up position.
3. Place the main receiver in a vertical or stand-up position.
4. Place the remote transmitter and the main receiver in locations where
the radio signal does not need to be sent through metal panels, thick
walls, multilevels, etc.
5. Try several locations. Sometimes moving either unit several feet or as
little as 6 inches will make a significant difference.
6. Try several different orientations. That is, turn the remote transmitter
and/or the main receiver unit to the left, then to the right.
7. Try setting both the remote transmitter and the main receiver to channel
2.
8. Replace the batteries in both units with new alkaline batteries and
repeat the above procedures.
On occasion radio-transmitted signals may not work in some environ-
ments. If this unit does not work in your environment, call 281 482-1714 for
help in answering questions.