BAXI 80e keeps cutting out

[jwturpin]

I have a Baxi 80e combi with a Towerstat RF/BM wireless programmer/thermostat.

All been plain sailing for a couple of years since the Towerstat replaced the old DIP switch module.

Lately, the boiler hasn't been responsing to the Tx unit. I thought it was a battery problem, but a fresh set didn't solve.

I figured it was interference, so I changed to Tx channel. No luck.

That problem magically stopped, as long as the Tx is close to Rx, to be replaced by a new problem, which is that once the heating has been on for a while and the radiators are only lukewarm, it just cuts out, and becomes unresponsive and a red light starts flashing ont he Rx module. If I press & hold the reset button and re-aquaint the Tx/Rx, then try again it works fine, only to cut out a few minutes later, and the red light starts flashing again.

This morning I noticed the pressure gauge was low, so I topped up the pressure, and it bagan working fine for a good 15 minutes, wand I initially thoguht because the pressure was low, it was overheating quickly and tripping out. But then it tripped out again! i'm losing my rag with this thing, and am beginning to think abiout replacing it all, as it is 10 years old!

I'm erring on the side of a Rx fault as having to have the Tx unit close by, and coupled with the red flashing light and having to reaquaint the two all the time. Either that or some thermostat has dies a death in the boiler itself.

Worth noting, the hot water works fine.

Any suggestions to get a new lease of life from my Baxi??

Cheers

JT

 

[kevplumb]

Any suggestions to get a new lease of life from my Baxi??

open the terminal box and link terminals 1&2

 

[jwturpin]

What will that do??
and by "terminal box" do you mean the terminals where the Rx module connects up, or is there another box with terminals in it?

Thanks!
Jon

 

[kevplumb]

the terminal box in the boiler

what will it do ?

it will get your heating on

 

[jwturpin]

but will that put it on permanantly, or still allow me to use the remote programmer/thermostat unit?

 

[kevplumb]

it will prove if its the boiler at fault or some poxy box of electronic $hite not working

 

[jwturpin]

ok, before I go connecting together two terminals, are they live, or low voltage triggers for a relay? and i take it this will just fire up the boiler bypassing the heating timer control, allowing the boiler to function independently and then i see if it's a boiler problem if it still cuts out?

 

[kevplumb]

ok turn the power off to the boiler first

yeah got it

 

[jwturpin]

damn things staying and working now....not sure i want to rock the boat....

 

[kevplumb]

shhhhhhh

the stat is at fault
personal thing i think they are poo

im sure dave hailsham will tell you whats wrong if you wait for him
meanwhile yer warm

 

[jwturpin]

ok, so I had heating for a couple of hours last night, but not this morning

I noticed again last night that the pressure gauge showed low(0.8), so topped it up(1.5). This morning it's showing low again(1), and coincidentally, no heating. Could I have a leak in the CH system?

Also, if it is the crappy stat, can you recommend a suitable alternative that isn't just a timer unit, maybe one that incorporates a wireless room stat?

thanks again.

Jon