Solar Thermal Maintenance Manchester
Solar thermal systems require annual servicing to maintain efficiency and prevent costly failures. The glycol heat transfer fluid that circulates between your roof collectors and hot water cylinder degrades over time, losing its antifreeze and corrosion-inhibiting properties. Without regular checks, degraded glycol can cause pump seizure, reduced heat transfer, and internal corrosion that shortens the life of your entire system.
Manchester Renewables provides annual servicing and maintenance for all solar thermal systems across Greater Manchester, regardless of who originally installed them. Our MCS-certified engineers check glycol condition, test pump operation, inspect collector integrity, verify controller settings, and check your system is generating the heat output it should. Every service visit includes a written report with findings and recommendations.
What Is Included?
Glycol Fluid Testing
We test the pH, concentration, and freeze point of your glycol fluid. Degraded glycol is drained and replaced with fresh food-grade propylene glycol antifreeze.
Pump Station Inspection
Checking pump operation, flow rates, pressure gauge readings, and expansion vessel pre-charge pressure to confirm the circulation loop is working correctly.
Collector Visual Inspection
Roof-level inspection of collector glazing, seals, mounting brackets, and pipework insulation for weather damage, condensation, or physical deterioration.
Controller & Sensor Check
Testing the differential temperature controller and both temperature sensors (collector and cylinder) to confirm accurate readings and correct switching thresholds.
System Pressure Test
Checking system pressure against the manufacturer's specification and investigating any pressure drops that may indicate a leak in the sealed glycol loop.
Performance Assessment
Comparing your cylinder temperature rise against expected values for the time of year to identify any loss of thermal performance.
Protect Your MCS Warranty: Maintain compliance
Regular servicing by an MCS-certified engineer is recommended to maintain compliance with MCS installation standards and support any warranty claims on collectors, cylinders, or pump stations. We provide documented service records for every visit.
Why It Matters
- Glycol fluid degrades over time — if left unchecked it becomes acidic, loses antifreeze protection, and can corrode internal components
- A seized circulation pump means zero heat transfer from collectors to cylinder, wasting all solar gain
- Failed temperature sensors can cause the controller to run the pump unnecessarily or not at all
- Annual servicing typically costs £80-£120 — far less than an emergency repair or full glycol loop replacement
Cost Guidance
Annual solar thermal servicing in Manchester costs £80-£120 per visit. Glycol fluid replacement (recommended every 5-7 years) costs an additional £100-£150 including the fluid and labour. We offer a maintenance plan at a fixed annual fee that includes the service visit, glycol testing, and priority booking for any repairs needed.