Well here's a zinger I am still working on. I have a house with two outbuildings. The outbuildings are on subs off the main at the house so it is all the same electrical system. Let's call them "House" and "building1" and "building2".
Two years ago, I installed a 2441TH in both House and building1. They have been working flawlessly ever since. House has both heat and central AC and building1 is just a ceiling-suspended gas garage furnace (electric start, no pilot) with heat only. There is an Insteon Hub in each building and I use the Insteon "House Management" feature to manage each building separately.
Recently, I finally added a bunch of Insteon equipment to building2 which never had any before. This includes several light switches and dimmers, a garage door sensor and another (third) 2441TH attached to a very old heat-only furnace.
Since I have done this, I find that the LCD on new 2441TH in building2 randomly goes blank. When this happens, I lose any connection to it from the apps and from Alexa but the furnace keeps running. At the same time, the 2441TH in building1 has suddenly started randomly changing its mode to OFF. This is very disturbing as the outside temps are now well below freezing and that building has plumbing and we are leaving for Florida soon. The 2441TH in House is apparently unaffected.
Coincidence?
As regards the mode change, I read in another thread that a furnace's electric-piezo starter can send a voltage surge to the tstat that can cause a mode change to OFF. But suddenly? After two years of flawless operation? Just when I added another thermostat in another building?
Here is what I have done so far:
For the random blank screen issue:
1) Installed several 1626-10 Plug-In Powerline Noise Filters as a precaution, mostly on appliances with motors and compressors (furnaces, dehumidifiers, refrigerators, etc.) and one or two power bars. No change.
2) Replaced the (40 year old) wiring in the furnace from the transformer to the gas valve (furnace in building2) with a harness that includes a 24VAC surge protector, fuse and ground. Used contact cleaner on spade connectors, screws plus dialectric grease. Turned the power back on the the thermostat came right up. Bingo! But wait, no, seconds later it went blank again. The valve is getting power, and the stat is connected to the same lugs. Why would the thermostat go blank? (This is a simple three-wire system, R to R, C to C and W to W. No green. Furnace has its own fan control sensor. No AC or other stages.)
3) Removed both thermostats from their corresponding building/hub.
4) Factory reset (at least I think I did, see below) and I pressed the "secret" reset button.
For the random mode change issue:
1) Same as 1 above.
2) Added same 24VAC surge suppressor.
3) Same as above
4) Same as above.
Result? So far, I have not seen either symptom again over several hours. I will keep monitoring and report.
Factory reset:
Manuals states:
Factory Reset
1) Press and hold Insteon Thermostat’s Set button until it beeps.
Insteon Thermostat will beep.
Insteon Thermostat Set LED will blink green.
2) Press and hold Insteon Thermostat’s Set button again until it beeps.
Insteon Thermostat will beep.
Insteon Thermostat Set LED will blink red.
3) Double-tap Set button.
4) Press and hold Set button again for about 10 seconds.
Insteon Thermostat will emit a long beep and its display will blink all segments.
5) When blinking/buzzing stops, release Set button and wait 10 seconds.
Insteon Thermostat will perform a series of self tests, then return to normal operations.
Insteon Thermostat display will return to normal.
The problem is, nothing after step 3 does anything. Holding for 10 seconds does NOT produce a long beep. Nor does the display "blink all segments" whatever that means. Rather, the LED just turns off and you find that it is starting over at step 1. There is no blinking/buzzing or anything like that. Both tstats were the same. So did I perform a reset? Dunno. But pressing the "secret" reset button inside on the PCB did maybe?
Two years ago, I installed a 2441TH in both House and building1. They have been working flawlessly ever since. House has both heat and central AC and building1 is just a ceiling-suspended gas garage furnace (electric start, no pilot) with heat only. There is an Insteon Hub in each building and I use the Insteon "House Management" feature to manage each building separately.
Recently, I finally added a bunch of Insteon equipment to building2 which never had any before. This includes several light switches and dimmers, a garage door sensor and another (third) 2441TH attached to a very old heat-only furnace.
Since I have done this, I find that the LCD on new 2441TH in building2 randomly goes blank. When this happens, I lose any connection to it from the apps and from Alexa but the furnace keeps running. At the same time, the 2441TH in building1 has suddenly started randomly changing its mode to OFF. This is very disturbing as the outside temps are now well below freezing and that building has plumbing and we are leaving for Florida soon. The 2441TH in House is apparently unaffected.
Coincidence?
As regards the mode change, I read in another thread that a furnace's electric-piezo starter can send a voltage surge to the tstat that can cause a mode change to OFF. But suddenly? After two years of flawless operation? Just when I added another thermostat in another building?
Here is what I have done so far:
For the random blank screen issue:
1) Installed several 1626-10 Plug-In Powerline Noise Filters as a precaution, mostly on appliances with motors and compressors (furnaces, dehumidifiers, refrigerators, etc.) and one or two power bars. No change.
2) Replaced the (40 year old) wiring in the furnace from the transformer to the gas valve (furnace in building2) with a harness that includes a 24VAC surge protector, fuse and ground. Used contact cleaner on spade connectors, screws plus dialectric grease. Turned the power back on the the thermostat came right up. Bingo! But wait, no, seconds later it went blank again. The valve is getting power, and the stat is connected to the same lugs. Why would the thermostat go blank? (This is a simple three-wire system, R to R, C to C and W to W. No green. Furnace has its own fan control sensor. No AC or other stages.)
3) Removed both thermostats from their corresponding building/hub.
4) Factory reset (at least I think I did, see below) and I pressed the "secret" reset button.
For the random mode change issue:
1) Same as 1 above.
2) Added same 24VAC surge suppressor.
3) Same as above
4) Same as above.
Result? So far, I have not seen either symptom again over several hours. I will keep monitoring and report.
Factory reset:
Manuals states:
Factory Reset
1) Press and hold Insteon Thermostat’s Set button until it beeps.
Insteon Thermostat will beep.
Insteon Thermostat Set LED will blink green.
2) Press and hold Insteon Thermostat’s Set button again until it beeps.
Insteon Thermostat will beep.
Insteon Thermostat Set LED will blink red.
3) Double-tap Set button.
4) Press and hold Set button again for about 10 seconds.
Insteon Thermostat will emit a long beep and its display will blink all segments.
5) When blinking/buzzing stops, release Set button and wait 10 seconds.
Insteon Thermostat will perform a series of self tests, then return to normal operations.
Insteon Thermostat display will return to normal.
The problem is, nothing after step 3 does anything. Holding for 10 seconds does NOT produce a long beep. Nor does the display "blink all segments" whatever that means. Rather, the LED just turns off and you find that it is starting over at step 1. There is no blinking/buzzing or anything like that. Both tstats were the same. So did I perform a reset? Dunno. But pressing the "secret" reset button inside on the PCB did maybe?
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