Home Support FAQ's Contact About LUX Press Room
Press Release
Lux Thermostats Blog
Blog
Facebook
Facebook
Twitter
Twitter
 
<< back to support page
» Support ELV4

Troubleshooting Poor Temperature Regulation
• This page lists problems that may affect the temperature performance of your LUX thermostat with suggested resolutions.
• For more detailed information please refer to the instructions that came with your thermostat.
The instruction manual for this model can be viewed in PDF format by clicking here.
 
Model ELV4
   
Problem Resolution
Indicates incorrect room temperature Refer to thermostat manual to verify that your set temperature is what you expect it to be.
Heats more than 5 degrees past its displayed set temperature  Refer to thermostat manual to verify that your set temperature is what you expect it to be.
Replace the batteries with fresh Duracell® or Energizer® alkaline batteries.
Adjust set temperature to at least 5 degrees below room temperature. Then adjust set temperature upward one degree at a time. Listen carefully for a soft click from the thermostat. This click should be heard near room temperature. Adjust set temperature down one degree at a time. Again listen carefully for a soft click from the thermostat near room temperature. 
Refer to your unit's manual to decrease the units swing value to a narrower setting.
Verify that your unit's placement and mounting are optimum per the installation section of its manual. 
No heat when expected Refer to thermostat manual to verify that your set temperature is what you expect it to be.
Refer to wiring to verify that it is according to the unit's wiring diagram. Verify that all connections are to your thermostat are clean and tight.
Replace the batteries with fresh Duracell® or Energizer® alkaline batteries. Press reset with small Phillips screw driver. It may be  necessary to reconfigure some settings after a reset.
Heat Test Adjust set temperature to at least 5 degrees below room temperature. Then adjust set temperature upward one degree at a time. Listen carefully for a soft click from the thermostat. This click should be heard near room temperature. Heat should operate immediately.
Adjust set temperature down one degree at a time. Again listen carefully for a soft click from the thermostat near room temperature. Heat should switch off immediately.
Advanced Troubleshooting This thermostat is designed to switch potentially hazardous line-voltage. Qualified service personnel may use the following information to trouble shoot the system.
The ELV4 uses a normally open single pole relay to control a heating system. It should open when hotter than its set temperature and close when cooler than its set temperature.
NOTE: Only the L1-IN/OUT pole is broken during normal temperature control.  The L2-IN/OUT pole is a pass-through and is always live unless the thermostat's Heat/Off switch is in the OFF position (which will break both L1 and L2 poles).
For further assistance: Contact your HVAC service company or our Technical Assistance Line if not resolved.
 
Top