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LUX TX500E - Heating & Cooling

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: LUX TX500E thermostat flashing fan. Have installed batteries backwards and reset to factory settings installed new batteries as well. Still flashing fan. Furnace not working.

With this thermostat, it may be flashing FAN because the HVAC (any heating or cooling unit) unit isn't working. In the winter, the pilot light for the heat may not be lit or the air intake/exhaust could be blocked. In the summer, the AC coils could be frozen or there may be another problem. Go to the HVAC unit and look for any lights at or near the control board. Check the outside unit for problems as well.

If there is no problem with the HVAC, try resetting the software in the thermostat. Use a bent paperclip to press the reset button above the Next button; the reset button is inside a small recessed spot. If the problem persists, try a different thermostat. If a different thermostat doesn't work, the HVAC system needs to be serviced.

I hope this helps. Please add a comment with the type of furnace you have (electric, gas, oil). That might help determine what issue you need to look for on the main unit.

Cindy Wells

Posted on Jul 03, 2015

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SOURCE: Our 2 zone hot water system has a HW v8043e1079 2004 and a v8043e1012; are these different? On override, zone 2 fires the furnace but 1 does not, even with the Lux TX500E thermostats swapped.

It would point to that zone 1 valve is not working .

Posted on Nov 29, 2016

Testimonial: "Character limits kept me from making this clear. The one that works (#2) was installed in 2010; #1 in 2004. They have different #s. How do they differ?"

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1 Answer

LUX TX500E thermostat flashing fan. Have installed batteries backwards and reset to factory settings installed new batteries as well. Still flashing fan. Furnace not working.


With this thermostat, it may be flashing FAN because the HVAC (any heating or cooling unit) unit isn't working. In the winter, the pilot light for the heat may not be lit or the air intake/exhaust could be blocked. In the summer, the AC coils could be frozen or there may be another problem. Go to the HVAC unit and look for any lights at or near the control board. Check the outside unit for problems as well.

If there is no problem with the HVAC, try resetting the software in the thermostat. Use a bent paperclip to press the reset button above the Next button; the reset button is inside a small recessed spot. If the problem persists, try a different thermostat. If a different thermostat doesn't work, the HVAC system needs to be serviced.

I hope this helps. Please add a comment with the type of furnace you have (electric, gas, oil). That might help determine what issue you need to look for on the main unit.

Cindy Wells

Jul 03, 2015 | Heating & Cooling

1 Answer

Flashing filter light on my lux 500e thermostat


turn the knob to filter & hit enter...should reset

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2 Answers

Lux TX500e thermostat


go to honeywell it,s a house hole name

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1 Answer

I recently have installed Lux TX500E thermostat removing old Honeywell 8034C. The old system has four wires: Red, Green, White and Yellow. Where should i connect the Red wire (RH or RC). Secondly, while...


There should be a jumper wire connecting both together, or a metal piece connecting RH and RC. So you should be able to connect it to both. That solves that problem as for the other I'm not really sure at the moment but I'll look into it and get back to you.

Feb 08, 2011 | Heating & Cooling

1 Answer

Lux timer will not ring


Your very old Lux timer has timed out and needs to be retired.

Aug 08, 2017 | Lux Hardware & Accessories

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