Forums
New posts
Search forums
What's new
New posts
New media
New media comments
Latest activity
Media
New media
New comments
Search media
Members
Current visitors
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Main Forums
Central Heating & Storage Heaters Forum
Why Does Red Light Go Off on Room Thermostats
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Help Support Talk Electrician Forum:
This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
Message
<blockquote data-quote="ProDave" data-source="post: 535561" data-attributes="member: 6969"><p>Are these mechanical thermostats with a rotary dial that goes click as it reaches the turn on or turn off point?</p><p></p><p>If so these rely on a neutral connection to drive an internal "accelerator heater" to overcome the inherent hysteresis with a mechanical thermostat. Correctly wired they can be very good. But "forget" the neutral connection and they can have a hysteresis of several degrees, which is the behaviour you describe.</p><p></p><p>Any competent electrician should be able to establish if this is the problem.</p><p></p><p>If you feel competent take the covers off one and post a photo of what is inside, but turn the power off first as some thermostats have lousy unprotected terminals so will be a serious shock hazard with the cover off.</p></blockquote><p></p>
[QUOTE="ProDave, post: 535561, member: 6969"] Are these mechanical thermostats with a rotary dial that goes click as it reaches the turn on or turn off point? If so these rely on a neutral connection to drive an internal "accelerator heater" to overcome the inherent hysteresis with a mechanical thermostat. Correctly wired they can be very good. But "forget" the neutral connection and they can have a hysteresis of several degrees, which is the behaviour you describe. Any competent electrician should be able to establish if this is the problem. If you feel competent take the covers off one and post a photo of what is inside, but turn the power off first as some thermostats have lousy unprotected terminals so will be a serious shock hazard with the cover off. [/QUOTE]
Insert quotes…
Verification
Post reply
Main Forums
Central Heating & Storage Heaters Forum
Why Does Red Light Go Off on Room Thermostats
Top