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Cycling, also called bicycling or biking, is the use of bicycles for transport, recreation, exercise or sport. People engaged in cycling are referred to as "cyclists", "bicyclists", or "bikers". Apart from two-wheeled bicycles, "cycling" also includes the riding of unicycles, tricycles, quadricycles, recumbent and similar human-powered vehicles (HPVs).
Bicycles were introduced in the 19th century and now number approximately one billion worldwide. They are the principal means of transportation in many parts of the world, especially in densely populated European cities.Cycling is widely regarded as an effective and efficient mode of transportation optimal for short to moderate distances.
Bicycles provide numerous possible benefits in comparison with motor vehicles, including the sustained physical exercise involved in cycling, easier parking, increased maneuverability, and access to roads, bike paths and rural trails. Cycling also offers a reduced consumption of fossil fuels, less air or noise pollution, reduced greenhouse gas emissions, and greatly reduced traffic congestion. These have a lower financial cost for users as well as for society at large (negligible damage to roads, less road area required). By fitting bicycle racks on the front of buses, transit agencies can significantly increase the areas they can serve.In addition, cycling provides a variety of health benefits. The World Health Organization (WHO) states that cycling can reduce the risk of cancers, heart disease, and diabetes that are prevalent in sedentary lifestyles. Cycling on stationary bikes have also been used as part of rehabilitation for lower limb injuries, particularly after hip surgery. Individuals who cycle regularly have also reported mental health improvements, including less perceived stress and better vitality.Among the disadvantages of cycling are the requirement of bicycles (excepting tricycles or quadricycles) to be balanced by the rider in order to remain upright, the reduced protection in crashes in comparison to motor vehicles, often longer travel time (except in densely populated areas), vulnerability to weather conditions, difficulty in transporting passengers, and the fact that a basic level of fitness is required for cycling moderate to long distances.

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  1. W

    Boiler keeps short cycling with only UFH is on

    Good morning, wondered if anyone can advise please on a resolution? My set up at home is that I have a 4-bed detached with 21 radiators (includes 4 towel rails), a 6m x 4m orangery/conservatory that was built last year with under-floor heating, and a Megaflo for storing hot water. The UFH...
  2. M

    Viessmann Vitodens 222-F: short cycling on hot water call

    I have a Viessmann Vitodens 222-F FS2B 26kW Storage Gas Boiler installed in 2014. The boiler has developed a problem recently where it short cycles but only when hot water is used. When hot water is turned on (on any tap in the property) the boiler remains off for about 45 sec. At the...
  3. B

    Boiler Short Cycling

    Hello, I wonder if anyone could offer some advice please? I have an Ultracom 30HXI that serves DHW, Radiators and UFH manifolds. The boiler is experiencing short cycling problems and I have had a heating engineer attend twice now and he is unable to diagnose. The problem is as follows: When...
  4. G

    Ideal Logic+ System cycling when no HW or C/H demand

    Hi. I have an issue with my Ideal Logic+ System S24 boiler which I hope someone can help with. Below is as much detail as I can think of. The boiler has been running constantly (cycling?) 24/7 for the last few days, during the recent very cold snap and since. HW and C/H are running fine, as per...
  5. F

    Ideal boiler cycling with Nest & Opentherm

    Hi all, I have an Ideal Logic max 35 and have just connected my Nest thermostat via opentherm. The boiler modulates the water temp fine but as the heat reaches the the target temp on the thermostat, the boiler turns the flame off, keeps the pump running and then every 90-120seconds refires the...
  6. A

    Boiler short cycling CH

    We are experiencing an issue with CH short cycling on a Worcester Bosch Greenstar 25i ErP boiler. From a cold start the boiler fires for only ~25 seconds before exceeding the set CH flow temperature and entering it's 3 minute short cycle programme. As soon as the short cycle programme kicks in...
  7. M

    Is my Boiler short cycling?

    Hi,my boiler has been running fine till this morning when it cut off with fan turning then it began try to fire its self up every 3 minutes we usually have on a timer for 3 hours first thing as we have newborn we have no issues when running hot water
  8. Jamm89

    Boiler cycling after balancing.

    H all, I spent a good day balancing my CH heating system with a digital thermometer. Couldn't quite get the magic 12DegC diff on all the rads but they all get nice and hot now. Some at the far end of the system have the lock shields fully open. The new problem I have encountered is once the...
  9. B

    Another Regular Boiler short-cycling on Hot Water problem...

    Hope someone can suggest where I should looking to resolve this one... I have a Bosch 30Cdi regular boiler on an S plan system with a 180L vented, indirect hot water cylinder. Boiler Temperature is set to 5 (67c) and the stat on the Hot water cylinder is set just below 60c. A Honeywell DU144...
  10. Jpm757

    Worcester Bosch Cycling Issue

    Good afternoon everyone, I am hoping you may be able to help me. I have a Worcester Bosch 19/24CBI boiler and it keeps cycling. When trying to heat the hot water (same for heating) the boiler is off more than it is on and thus unless timed for a very long time never gets the desired outcome. In...
  11. L

    Combi hot water cycling hot cold hot cold

    Morning all, ok so since having a new Worcester greenstar 8000 combi installed I’ve been struggling to get constant hot water… it runs hot for a minute or two then cold then hot etc. the system has been power flushed, magnacleansed, radiators agitated (very little sludge came out) it has mesh...
  12. Jamm89

    Baxi duo Tec 2 GA temperature cycling when hot.

    Hi all. Can anyone shed some light on this fault please. Boiler is cycling when system is hot. It's a 40kw combi ~ 8 years old. we have 10 rads on the system. 1 towel rail isn't currently working in the bathroom maybe an airlock? Have previously had an airlock on one of the rads downstairs...
  13. W

    Short cycling in Potterton Kingfisher (Pilot not lit)

    Hello, This post is a continuation of my post of yesterday entitled Short cycling in Potterton Kingfisher, BUT with an important change in information. In my previous post, I gave the sequence of events as follows: a) Fan starts running b) A few seconds later the green Flame LED lights up c) A...
  14. W

    Short cycling in Potterton Kingfisher

    Hello, Our boiler is an old (installed in 2005), Potterton Kingfisher (MF 40-100), using a pressurised system. It recently started short cycling, where the pump runs for a few seconds and then the green LED Flame indicator lights and a couple of seconds later both the pump and the LED stop. This...
  15. P

    Replaced CH Pump Primaflow CP5 -> Short Cycling

    Morning and Happy New Year everyone! As is typical over the Christmas period my Central heating circulating pump died on new years eve. It had sounded like a bag of spanners for a while so i wasnt totally surprised. But its timing was impeccable. The pump i replaced was a Primaflow CP5 (GPD...
  16. R

    Riello rdb1 not cycling beyond purge

    Hi guys, will be grateful for your advice. Riello rdb1 in Grant combi. When boiler has been switched off for several hours on start up burner cycles properly and boiler runs OK. Having reached operating temp with heating and hot water all fine, on demanding heat once again the fan motor runs but...
  17. D

    Boiler HW short cycling due to mixer tap

    Hi. My boiler (a Vaillant Ecotec Plus 8xx) short cycle HW every few seconds and, because of the he priority it means no central heating. If I close the hot water circuit (turning the valve underneath the boiler) then the CH works fine. So, I can either have hot water or central heating. The...
  18. M

    Glow Worm burner cycling on Pmax when trying to gas rate

    Hi I am gas safe registered, when commissioning glow worm Ultimate 3. Have put into p.01 to gas rate and set at Pmax, but burner keeps cycling on and off rather than running at full rate, so am getting incorrect gas rate, any thoughts?
  19. B

    Potterton Performa 30HE hot water goes off - power cycling restores

    Hi I have a Potterton Performa 30HE in a one bedroom apartment. For a few months I have noticed that it takes several minutes before the taps to run hot. But last week they stopped running hot altogether. I have found that if I switch the electrical power to the boiler off and on again normal...
  20. E

    Vaillant ecoTEC plus 824 actuator motor cycling

    Hi, as title says the actuator motor keeps cycling and sounds like the gears slipping. The pump is running freely and the diverter valve is running free. I have seperated the motor from the diverter valve and extended the motor piston. On powering up the boiler the piston retracts but then goes...
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