Problems With Microbore Central Heating ~upd~ Jun 2026

The narrow diameter of microbore tubing limits the volume of water that can pass through the heat exchanger at any given time. This restriction can cause the boiler to "cycle" on and off rapidly (short-cycling) because it cannot dissipate heat fast enough. Not only does this waste energy, but it also significantly shortens the lifespan of expensive boiler components. Difficulty in Repair and Maintenance

Maintaining a microbore system is often more expensive and labor-intensive than standard systems: problems with microbore central heating

If you are upgrading your boiler, microbore systems present a major headache. The narrow diameter of microbore tubing limits the