Another Boiler Problem! - SV650.org

DarrenSV650S · 04-01-10, 10:19 PM

We've got an instant gas boiler. Recently when I've been using the shower the water doesn't get hot, it's just lukewarm. The only way to get it hot is to only open the tap very slightly so that the water is coming out slower.
And the kitchen tap keeps changing from hot to warm when it's being used

I was thinking it could maybe be something to do with the pressure sensor for the hot water? Is that adjustable?

Anyone know what the problem could be?

Some pics

04-01-10, 10:29 PM

Believe it or not when the weather is colder outside, i mean proper cold, the bolier is working harder to heat the water up, mine does the same, i have to turn it more to the left for hotter on the shower.

Could be the thermistors also.

04-01-10, 10:57 PM

Quote:

Originally Posted by specialone

Could be the thermistors also.

+1

Chris.

DarrenSV650S · 04-01-10, 11:14 PM

Hmm I'll try cranking up the water temperature then

05-01-10, 12:25 PM

Which vokera model is that?

It looks older than mine - but you have an auto button! I wish I had one of those.

Much boiler envy!

05-01-10, 12:27 PM

yep.. typically its the boiler output, its trying to heat up water fro 5 to 45 dges v v quickly, so if you turn the temp up this should help.

Heating water for showers is what works the boiler the hardest.

05-01-10, 12:43 PM

Next to your central heating pump (I'm assuming you have heating, just not hot water?), there should be a 2/3 way valve, with a little lever on it. It'll be set to auto but move it to open and I think that should give you some hot water. These valves seem to last 5-7 years.

Luckypants · 05-01-10, 01:04 PM

Quote:

Originally Posted by rpwoodman

Next to your central heating pump (I'm assuming you have heating, just not hot water?), there should be a 2/3 way valve, with a little lever on it. It'll be set to auto but move it to open and I think that should give you some hot water. These valves seem to last 5-7 years.

Unlikely to be a 3-port valve on a combi-boiler, which this one seems to be.

05-01-10, 01:24 PM

The only way to get it hot is to only open the tap very slightly This has happened to me b4..on jobs iv been out to.. if the water is coming out of the sink taps OK (HOT) ..but not the shower them its the thermostat on the shower or u some time have small flat fitters in the shower were u turn on the shower they may need clearing. let me know

DarrenSV650S · 05-01-10, 06:25 PM

Just turned it up today so I'll test it tomorrow. The shower doesn't have a thermostat

04-01-10, 10:19 PM	#1
DarrenSV650S Member Mega Poster Join Date: Jul 2006 Location: Dundee Posts: 4,414	Another Boiler Problem! We've got an instant gas boiler. Recently when I've been using the shower the water doesn't get hot, it's just lukewarm. The only way to get it hot is to only open the tap very slightly so that the water is coming out slower. And the kitchen tap keeps changing from hot to warm when it's being used I was thinking it could maybe be something to do with the pressure sensor for the hot water? Is that adjustable? Anyone know what the problem could be? Some pics

04-01-10, 10:29 PM	#2
Specialone Guest Posts: n/a	Re: Another Boiler Problem! Believe it or not when the weather is colder outside, i mean proper cold, the bolier is working harder to heat the water up, mine does the same, i have to turn it more to the left for hotter on the shower. Could be the thermistors also.

04-01-10, 11:14 PM	#4
DarrenSV650S Member Mega Poster Join Date: Jul 2006 Location: Dundee Posts: 4,414	Re: Another Boiler Problem! Hmm I'll try cranking up the water temperature then

05-01-10, 12:25 PM	#5
Kinvig Guest Posts: n/a	Re: Another Boiler Problem! Which vokera model is that? It looks older than mine - but you have an auto button! I wish I had one of those. Much boiler envy!

05-01-10, 12:27 PM	#6
454697819 Guest Posts: n/a	Re: Another Boiler Problem! yep.. typically its the boiler output, its trying to heat up water fro 5 to 45 dges v v quickly, so if you turn the temp up this should help. Heating water for showers is what works the boiler the hardest.

05-01-10, 12:43 PM	#7
rpwoodman Guest Posts: n/a	Re: Another Boiler Problem! Next to your central heating pump (I'm assuming you have heating, just not hot water?), there should be a 2/3 way valve, with a little lever on it. It'll be set to auto but move it to open and I think that should give you some hot water. These valves seem to last 5-7 years.

05-01-10, 01:24 PM	#9
Damian Guest Posts: n/a	Re: Another Boiler Problem! *The only way to get it hot is to only open the tap very slightly* This has happened to me b4..on jobs iv been out to.. if the water is coming out of the sink taps OK (HOT) ..but not the shower them its the thermostat on the shower or u some time have small flat fitters in the shower were u turn on the shower they may need clearing. let me know Last edited by Damian; 05-01-10 at 01:25 PM.

05-01-10, 06:25 PM	#10
DarrenSV650S Member Mega Poster Join Date: Jul 2006 Location: Dundee Posts: 4,414	Re: Another Boiler Problem! Just turned it up today so I'll test it tomorrow. The shower doesn't have a thermostat

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Boiler Issues, again!	Kinvig	Idle Banter	8	20-12-09 03:36 PM
Ideal Boiler Help - Any Plumbers/Gas fitters?	krhall	Idle Banter	8	01-09-09 07:29 PM
Combi-boiler advice	JediGoat	Idle Banter	19	14-02-08 01:50 PM
Central Heating Boiler	Reckless Rat	Idle Banter	11	02-01-08 11:20 PM
gas boiler has gone	steveg	Idle Banter	14	06-10-07 10:46 AM