Search the forum,

Discuss No lights on Honeywell HCW80 relay unit in the Plumbing Jobs | The Job-board area at PlumbersForums.net

Messages
4
Hi,
My Honeywell HCW80 relay unit is not lighting up at all when I press or hold the button. I believe this fault is causing my central heating to have stopped. Looking behind the cover, things look fine, but I'm no expert. What would be the best course of action here?

Picture of the relay unit I'm on about:
s-l1600.jpg
 
Yes it’s rf. if not switching on and off need to check getting 240v supply to it first before condemning it. If it has 240v supply to it it’s quite easy to bypass it and get heating back on until you get it replaced but depends on your competence with electrics
 
Last edited:
Should work if you press the button once / light should come on

If it doesn’t needs investigation to see if it’s got power eg multi meter
 
Could I try and connect some of the terminals in order to send an ignition signal to the boiler? If so, what object could I use?

This question indicates to me that you really need to stop at this point. You are going to electrocute yourself or end up with a face full of molten metal spray when you short the wrong things. Make it safe by putting the cover back on and call a heating engineer (or an electrician who does central heating controls) to get you sorted out.
 

Reply to No lights on Honeywell HCW80 relay unit in the Plumbing Jobs | The Job-board area at PlumbersForums.net

Similar plumbing topics

Hi all I'm hoping someone can shine a light on this for me Since our stop tap on the pavement has now been filled with sand for whatever reason, we are relying on our property fitted stopcock (this is outside on our garage wall) Unfortunately turning this to the closed position only reduces...
Replies
3
Views
176
Hi All I have a leak coming from within my Mira Elite QT shower. It seems to be flowing from behind the switching Control. Any ideas what could be causing this leak. Already Changed the Pump Elbow as one of the clips had popped which was causing a second small leak, Any idea? Is it time to buy...
Replies
0
Views
207
My son has an apprenticeship interview for to become a plumber and heating engineer. The have said there will be a multiple choice exam for this for suitability. The thing is my son panics during tests/exams. Is there any book I can buy him to practice the multiple choice test for the exam? What...
Replies
3
Views
357
Hi guys. I'm trying to identify a toilet model before ordering a seat for a customer. I went to what used to be a Roca stockist (they no longer are) and one of the guys there reckoned it might be "The Gap". I went to the new stockist and the guy there disagreed it was "The Gap" and that he'd...
Replies
2
Views
118
Hello all, I'm would like to extend an existing outside tap to another point in the garden. I'm about to pour a concrete patio and was hoping to run the water line underneath. There are existing drain (and who knows what) pipes running along the same wall so I'm nervous about digging too far...
Replies
5
Views
144
Creating content since 2001. Untold Media.

Newest Plumbing Threads

Back
Top
AdBlock Detected

We get it, advertisements are annoying!

Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.

I've Disabled AdBlock