Questions tagged [central-heating]

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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2answers
17 views

Why does a system boiler with hot water cylinder not use a diverter valve?

I understand that it doesn't need a diverter valve... But I was thinking, couldn't the system be more efficient with one? For example, the central heating could run at a low temperature (35°-40°) and ...
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1answer
45 views

Why does my thermostat show code 'PF' after running the fan or A/C?

After running either just the central HVAC fan, or the central HVAC AC for just a few minutes, the Bryant thermostat (Model TSTATBBPB101, C Wire attached) screen momentarily shows "PF", and then goes ...
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1answer
31 views

Running AC/Heater when washing a cleanable filter

I have a heat pump/AC system with a washable air filter. I was told to clean the filter out and run water through it once a month. He told me to let the filter dry for 3 hours before replacing it. I ...
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49 views

HVAC Exhaust Routing Question

Just wondering if I could get some advice on the optimal way to route the HVAC Exhaust piping. Enbridge replaced the supports underground and before they turned the gas back on they did an inspection ...
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1answer
30 views

Goodman furnace - C Wire connection

I'm trying to connect the C wire in my Goodman furnace in order to install a new thermostat. I've read all the posts on this forum about this specific issue so my question is whether i'm in the right ...
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4answers
127 views

Are individual electric heaters more efficient to operate than an electric boiler?

(Edited to provide additional info) My wife is looking to buy an old house (I'm guessing 19th century) that'll need a lot of renovating, including the heating system. Renovation works will include (...
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1answer
49 views

Flexible round duct - What to use

I'm re-routing some 10x3.25" duct through a bulkhead in my kitchen. Planning to change over to 6" round duct for a 4' segment that is relatively straight (no 90s). It was my intention to use non-...
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1answer
23 views

Vaillant aquaPLUS filling loop

I have to repressurize my Vaillant Aquaplus gas boiler, and I couldn't understand from the manual where exactly the internal filling loop should be fitted. The water pipes don't have any valves ...
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6answers
4k views

Is Electric Central Heating worth it if using Solar Panels?

I understand that electric heating is less efficient and comparatively more expensive than gas heating (propane or natural gas), but considering I live in Texas (a lot of sunlight) and I intend to ...
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0answers
17 views

HVAC: attic heat loss

Should a ventilated attic (w. Openings in the eaves) be warm in the middle of a cold winter that has a heat pump installed as the heating system for the living area below. If it is warm does that mean ...
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1answer
35 views

How do I determine why a sealed central heating system is losing pressure?

I'm currently trying to deal with a sealed central heating system in which the pressure is dropping by 0.2–0.3 bar per day (this is obviously far too fast, because the intended pressure for this ...
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1answer
33 views

uncontrollable heating in multi unit apt

I have a 6 unit 2 story apt bldg which has only one basement furnace controlled by one thermostat from the first floor apt #1. The duct work has dampers to each unit. the problem is that the temp in ...
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2answers
50 views

HZ432 and no heat in one zone

I have 4 zones... The following lights are on the HZ432: Heat 1 - red Heat 2 - red Heat 3 - no light Zone 1 - yellow Zone 2 - red Zone 3 - red Zone 4 - red I have heat in 3 zones, but not in one of ...
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34 views

HVAC System Making a “Turning Over” While Heating

My HVAC system is running for a very short time, then turns off and then makes this turning over noise. It's a 10 year old Amana heating and air conditioning unit. The sound seems to be coming from ...
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1answer
105 views

Central Heat Won't Turn On When I Raise the Temperature on Nest Thermostat

I'm sure my heater is working. It's 47 degrees outside, and I'm only a little cool inside. My Nest thermostat is set to 67 degrees. The screen on my app (which agrees with the thermostat) is shown ...
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1answer
75 views

Is there a more environmentally-friendly alternative to using oil to heat a house with oil heating installed?

I currently live in a house (in the UK) which is too remote to be connected to the mains gas supply, with an oil tank which is used for central heating. This is obviously not great for the environment,...
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2answers
519 views

Can I just cut power to a central air and heating system, or should I follow a shutdown procedure?

I am going to install some NEST thermostats. The directions say that I should turn the system off by turning off the power to it. However, I'm worried that an abrupt power cut will be damaging. Do I ...
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1answer
667 views

Are these red lights on my Honeywell HZ432 why my bedroom isn't blowing in heat?

I just moved into a new multi-family house with central heat/AC and the 3rd floor bedroom doesn't seem to warm up very well. When the thermostat is on, I don't feel hot air blowing in from the vents ...
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1answer
76 views

How to improve heating/AC flow in second floor?

We moved into our house about a year ago and the second floor in my house never get enough heat in winter or cold AC in the summer. Our first floor can be a 72F deg while our upstair stays at nearly ...
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1answer
40 views

Why does my radiator only come on when other radiators are on too?

We've just fitted smart TRVs and since doing so we've noticed that the radiator in our bedroom is usually cold, even though according to our settings it should be heating up. It does heat up a little ...
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0answers
106 views

Fan only mode not turning on blower - 2 wire blower

Our manufactured home has a colman furnace and for heating it works fine. I would like to use the fan only mode when we have the fire place going but it is not hooked up, and I just want to make sure ...
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0answers
50 views

Heating System Premature CutOff / DIY Options?

I've collected all of the facts about my system and the problem we are seeing. We have two external air pump units outside the house and a Rheem furnace (GH36S, 36000 BTU) that appears to be working. ...
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1answer
172 views

Glow Worm Flexicom HX boiler F11, F22, F25 Error codes

This is less of a question, but more of a list of things we tried to stop the frequent F11, F22 and F25 error codes appearing on our Glow Worm Flexicom HX boiler which would stop it from functioning. ...
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1answer
1k views

Why does my furnace only work after power reset?

I’m having issues with my furnace sometimes not kicking on. I hear the furnace start, But then it will not fire. However, If I go down to the basement and flip the power switch off and on the ...
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1answer
41 views

Heating Split level

I'm surprised that I can't find more useful information on this. I have a split level home. Main floor contains living dining and kitchen. 8 stairs up to top level with 3 bedrooms and a bathroom. ...
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1answer
30 views

If I only want to pressurise central heating not hot water should I get a regular boiler or system boiler

My boiler has packed in, the heat exchanger has failed and the consensus is that was due to sludge, gunk in the system, also consensus is would be better to pay a bit more and get a new boiler and ...
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1answer
37 views

Wall grille that fits one step stair

Between my dining room and living room upstair area, there is one step down and there is a wall grille that is 5.5" tall. What drives me nut is there is no 14x5.5 grille anywhere. There is either ...
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2answers
51 views

Stuck valve on heating system

I've just moved into a new house and the heating doesn't work, hot water isn't circulating. I've narrowed it down to a stuck valve on the inflow to the water pump, it seems that the valve is closed. ...
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0answers
33 views

Dual energy controller 2AC02700701 runs heat pump with low fan only

I am running a central heat system that uses a heat pump as stage 1 and a gas furnace as stage 2. The thermostat is not directly connected to the furnace and heat pump motor, instead to goes through a ...
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2answers
73 views

Thermostat White-Rodgers 1F82-261 switches to stage 2 heat for no apparent reason

I am running a central heat system that uses a heat pump as stage 1 and a gas furnace as stage 2. The thermostat used is the White-Rodgers 1F82-261 which supports 2 stages of heat. When using regular ...
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2answers
271 views

Is the ventilation in my utility closet a construction mistake?

With colder weather here in Northern Colorado (down to 22° F) my Goodman 90% efficiency furnace (GKS90453BX) came on for the first time in the (ca. 2005) home that I recently moved into. The furnace ...
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0answers
41 views

What is the function of this valve marked VB in my central heating

I've been trying to track down why one of my radiators in a newly acquired house has no flow. After finding that one side of the radiator is blocked off, further investigation located a motorised ...
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1answer
156 views

My AC and Heat systems are separate, Can I wire one or both fan(only) controls to my thermostat?

My house used to have just Forced Air heat, but a year and a half ago, I had central air installed. When it was installed I had questions about the wiring they weren't addressed to my satisfaction. ...
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78 views

Nest Thermostat E and OpenTherm

On nest.com it's possible to find out that the 3rd generation Nest Learning Thermostat supports OpenTherm protocol to communicate with a central heating boiler. Does the cheaper (and the very recent) ...
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1answer
61 views

What type of tradesman do I need if the downstairs of my house is too cold

I have bought a home and in winter the extremities of the ground floor are very cold. The original part of the building is the centre, and it has been extended in the front and the back. The main ...
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1answer
37 views

Under Floor Heating (Wet) - pipe coupler under the screed?

I want to fit UFH to a whole house - normally it would be an easy process if one could just move out and live somewhere else as the whole house gets gutted and re-done. However, ideally, i want to fit ...
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1answer
80 views

Advice on adding a LPG Gas Boiler on Central Heating System with a Hot Water Storage Tank heated with Solar Panels

I am from Kathmandu, Nepal, and presently trying to install a central heating system in my house using Solar Water Heater. Background: Winter days in Kathmandu lasts about 130 days a year. Minimum ...
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1answer
38 views

Drain down heating system

I'm currently draining my heating system (radiator valve sprung a leak), however I have left it for a ages (1 hour) and it is still going, when I turn the bleed valve on an upstairs radiator air does ...
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1answer
111 views

Metallic smell when HVAC Unit. fires up. What could it be?

Background: The HVAC unit I have serves both the 1st and second floor, but does a poor job of distributing heat to the 1st floor. The previous owner added a hydrodronic boiler and baseboards to the ...
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1answer
612 views

Ecobee 4 installation - No C constant 24V option on Furnace

Ecobee 4 installation help? Any handy people available? I am looking to install an Ecobee 4 in my condo. There is an older HVAC system, Unilux LE600. The furnace itself does not have a C connector, ...
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1answer
41 views

Is it possible to test a drained central heating system without filling it with water

Say there is a house with a just combination (combi) boiler for hot water, but the central heating system has been drained for a couple of years as the house has been uninhabited. Is it possible to ...
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21 views

How to fix noise in my bedroom since change of furance/ac but not air ducts?

I had furnace company back out and he told me it is probably a problem with a damper but it would be hard to find out where. It is only loud in my room on second floor but not in other bedroom next ...
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2answers
48 views

Upgrading from a 3 wire rotary thermostat to a Electronic Digital

This is my first post so please be gentle. I currently have a Honeywell rotary thermostat (240V) 3 Wires plus earth. Live in Neutral (for the anticipator I believe) Switched live out I appreciate ...
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1answer
2k views

Why is there a vent on the ductwork coming right from the furnace?

Why is there a vent on the ductwork coming right from the furnace? I have a typical furnace for a 1400sqft house in Michigan. I also have central air which runs through the same duct work. There is a ...
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1answer
74 views

Cost effectiveness of fireplace with insert vs electric furnace

Now that winter is here I have been using my fireplace (that has an insert) more and more instead of my furnace that has a electric heater. I was wondering which method of heating would be the most ...
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2answers
47 views

Central heating [uk] thermostatic valves

I'm the UK in case that matters. I have a traditional gas central heating with radiators. As is common, the radiators have thermostatically controlled values, except for one of the radiators which ...
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1answer
54 views

gas furnace will not come back on

our goodman gas furnace fires up but when the temperature drops and it should come back on it doesn't unless we hit the reset switch. Repairman has been out and changed the breaker and thermostat. ...
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2answers
957 views

What should the plenum temperature be on a modern furnace

I had a tech out to review my furnace that's not keeping up - a Trane XV80. They poked around, and saw that the plenum temperature is 95F. They then told me that it should be around 140F, which is ...
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1answer
33 views

Can a flexible flue liner be installed in an old central heating flue for modern HVAC systems?

I have an old gas central heating system which has recently failed. Newer systems cannot leverage the old flue as they require an internal pipe as well. Replacing the flue will cost a considerable ...
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1answer
341 views

Water radiator system has single loop instead of flow & return pipes — does this make sense?

I have a hot water heating system connected to several radiators throughout the house. While all diagrams I have seen of radiator plumbing have a separate flow and return pipe, this one has a single ...