Gledhill Appliance Repair in Topsham

What does error code 29 mean on a Gledhill A-Class system?

Error code 29 on Gledhill A-Class systems indicates a watchdog communication error between internal components. This is a terminal fault requiring professional repair. The Appliance Control Board and potentially other components need replacing. Contact Gledhill technical support or a qualified heating engineer.

What does error code 51 mean on a Gledhill A-Class system?

Error code 51 on Gledhill A-Class systems indicates the S6 temperature sensor (store middle) has a short circuit. Turn off the system and isolate from the electrical supply. Check sensor wiring and connections. If intact, the sensor requires replacement. Contact a qualified heating engineer to fit a genuine Gledhill replacement sensor.

What does error code 43 mean on a Gledhill A-Class system?

Error code 43 on Gledhill A-Class systems indicates the S6 temperature sensor (store middle) has an open circuit. Turn off the system and isolate from the electrical supply. Inspect sensor wiring for damage. If wiring appears intact, the sensor is likely faulty. Contact a qualified heating engineer to replace with a Gledhill-approved sensor.

What does error code 42 mean on a Gledhill A-Class system?

Error code 42 on Gledhill A-Class systems indicates the S5 temperature sensor (store bottom) has an open circuit. Turn off the system and isolate from the electrical supply. Check sensor connections at the controller. If secure, the sensor requires replacement. Contact a qualified heating engineer to diagnose and replace the faulty sensor.

What does error code 10 mean on a Gledhill A-Class system?

Error code 10 on Gledhill A-Class systems indicates an overheat lockout. The system has detected dangerously high temperatures and entered safety lockout. Turn off the heat source immediately and allow to cool before attempting reset. If the fault recurs, contact a qualified heating engineer to diagnose faulty sensors or valves.

Does my Gledhill unvented cylinder need an annual service?

Yes, all Gledhill unvented cylinders require an annual inspection of the key safety devices fitted to the system. This service must be performed by a G3-qualified engineer.

Why don't Gledhill thermal stores need legionella pasteurisation cycles?

Gledhill thermal stores heat mains water instantaneously as it passes through a plate heat exchanger, rather than storing domestic hot water. Since the tap water is never stored within the appliance and is heated on demand, there is no standing water where legionella bacteria could multiply. This design eliminates the need for high-temperature pasteurisation cycles required by traditional stored hot water cylinders.

Can I leave my Gledhill thermal store switched off for extended periods?

Gledhill does not recommend leaving your unit switched off for prolonged periods without draining it. If the water in the copper cylinder remains cool for an extended time, the natural rate of corrosion accelerates, reducing the appliance lifespan. Additionally, if power is off, the pump is not exercised regularly and may seize. If you need to leave your property for several months, have the unit professionally drained.

Are Gledhill cylinders compatible with solar thermal panels?

Yes, Gledhill produces the Torrent SOL range specifically designed for use with solar thermal panels. These models feature a high-efficiency solar coil and can work alongside conventional boilers, providing mains pressure hot water. When solar energy is insufficient, the system automatically reverts to the boiler as the primary heat source. A backup immersion heater is also included for emergency use.

How do I drain my Gledhill cylinder?

To drain the cylinder, first turn off the boiler and immersion heater, then allow the water to cool before proceeding. Open all hot taps in the system and run until cold, then hold open the pressure and temperature relief valve until water stops discharging into the tundish. Open the ball-o-fix isolation valve before the anti-vacuum valve, then open the drain cock and immediately hold open the P&T relief valve again until the cylinder is completely drained.