For questions regarding a central heating system for the home. The system consists of a furnace or boiler and a method to distribute the heat throughout the home.

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Why is my Central Heating taking so long to heat up?

I'm in the UK with a small modern, well insulated, double glazed home heated by a traditional gas boiler. My heating had been achieving room stat temperature within 30 minutes but is now taking at ...
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2answers
2k views

What should I do about this Alpha HE CB33 Boiler pressure error condition?

I have an alpha he cb33 boiler which has stopped working this morning. Yesterday I removed a radiator for cleaning then put it back on and re-pressurised the system. It was working ok last night. ...
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1answer
297 views

Why does my heat pump keep triggering the high-pressure cut-off?

Our Rheem heat-pump is on the fritz. It keeps triggering the high-pressure cut-off on the outdoor unit. We've had problems with this happening before, but only when the outside temperature got to ...
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1answer
216 views

Why does the blower in the attic vibrate during heating when it is really cold?

We have a Carrier heat pump system in our home, and the blower is located in the attic. When it is especially cold, the blower runs on high (there are three levels: high, medium, low). During this ...
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1answer
624 views

What could be causing my Lennox furnace to blow cool air?

My Lennox outside furnace is blowing cool air, not hot even when the burner is lit. It takes 3 times longer to heat the house than it should. I just had the draft motor replace about a month ago and ...
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0answers
99 views

Why would the input gas pressure fall when the central heating boiler calls for heat?

Since the annual service of my traditional gas boiler the house takes considerably longer to heat up. The boiler flame no longer seems as "fierce" as previously. I'm told the burner pressure and ...
2
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0answers
143 views

Why aren't my radiators heating up after I replaced a rusted through pipe?

We had a bit of corrosion in an old pipe and it started leaking and losing pressure and so I drained all the central heating system (radiators), replaced the pipe and fitting. It was awkward and the ...
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0answers
313 views

Are w1 and w2 both energized during a second stage heat call from the thermostat?

Short version: does two-stage thermostat always close W1 circuit when it closes W2 circuit, or they might be closed independently? Long version: I have two-stage furnace, currently connected to older ...
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0answers
273 views

Why won't my condenser turn on when I run my heat pump?

I have a York Affinity condenser. When I run my heat pump, I expect it to turn on somewhere in the cycle but it doesn't. It generally does this once a year. The usual fix is to cycle the power of the ...
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0answers
25 views

Two radiators are always hot

Three months ago I moved to a house with a back-boiler (gas) which supplies the hot water tank and the central heating. Apparently it has been serviced recently. There is a thermostat in the kitchen ...
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0answers
43 views

What material to use to clog previously cut central heating pipes

I used to have a central heating system which was never in use for years, because it couldn't be connected to central pipe inside other building. Last winter I finally dropped water from it and cut ...
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0answers
66 views

Does my Central Heating system need balancing?

The difference in flow and return temperatures at each radiator varies between 2C (lowest) and 7C (greatest). Although all of my radiators get hot I understand the desired differential is 10-12C. Do ...
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0answers
107 views

What is the effect of differences in flow and return rates in a traditional gas central heating system?

Would a smaller or lower differential in flow and return rates in a traditional gas boiler "Y" central heating system make the house take longer to heat up? Is there any way to adjust these flow ...
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0answers
10 views

How to fix uneven central heating and air?

My central heating and air conditioning system does not heat my home evenly. Half of the house gets significantly warmer / cooler than the other half. I have tried adjusting the registers, but to no ...
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0answers
25 views

Why does the A/C come on downstairs when heat is on?

I just moved in to a 2-story house. It is zoned upstairs and downstairs. If I turn the downstairs thermostat to OFF and the upstairs to COOL, the HVAC in the attic comes on, the outside compressor ...
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0answers
96 views

Heater/blower always on

Another puzzler. I have a Lennox CBX26UH 3-ton air handler with the 2-stage, 3-element 15kW electric heater option. The problem, as in the title, is that the system, when power is applied, is always ...
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0answers
75 views

How to stop central heating system from leaking

Our central heating system is leaking a bit of water. The system is a Ferolli Megadens 5, it heats water for both the central heating system and the shower/tap. There are several pipes below the ...
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0answers
35 views

Why did my central heat shut down?

I did maintenance and turned on the electric heater switch on thermostat to Central Unit. It came on just fine and warmed up the house and shut off automatically. But it never came on again. The a/c ...
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0answers
59 views

Are wall air vents a potential problem?

A house I'm looking at has A/C vents in the walls, rather than in the ceiling or floor. I've never lived in a house with air ducts in the walls. Can I expect to have problems? The house was built in ...
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0answers
62 views

Honeywell wireless thermostat and central heating controler problem

We have a Honeywell wireless thermostat and central heating controller. It is set to maintain a temperature at 21c between 8 and 10, and then between 4 and 10. In the other periods, it is set to ...
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0answers
590 views

What might cause the heating to get “stuck” off regardless of room thermostat?

What could cause my heating system to get "stuck" in a state where the boiler will no longer come on in response to the room thermostat, and I can only seem to "fix" it by turning the property power ...
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0answers
604 views

maxipod heat store problem

I have a heating system using a 300litre heat store tank. It is connected to solar as well as oil and a solid fuel stove. A coil provides mains pressure hot water. Oil & solid fuel flow pipes go ...
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0answers
686 views

What could cause my radiators to go cold when the hot water is turned on?

when only heating is selected on my program timer the radiators all work fine and are hot. But when both heating and hot water are on the water gets hot but all the radiators go cold. When the hot ...