Fault Finding

Fault finding guide for Non WarmCair models

This handy booklet will provide you with the following information.  These should only be carried out by a correctly qualified Gas Safe Engineer. 

  • General Ventilation Information
  • Modairflow Series 1
  • Modairflow Series 2
  • Non Modairflow Series 2
  • System E-T
  • Economaire
  • proportional Balancing
  • Heat Exchanger Check
  • Spillage Test

Fault Finding All WarmCair Range

This guide goes through fault finding for all the WarmCair range, both C and DW.  It also included technical data for these heaters.

These should only be undertaken by a correctly qualified Gas Safe Engineer. 

Areas covered

  • WarmCair C Range
  • Technical Data
  • Fault Finding
  • Fault Finding Flow Chart
  • Defect Diagnosis for the Circulation Air Fan
  • Functional Wiring Diagrams
  • Condense Pump Re-Wire
  • Circuit Diagram for Condensing Warm Air Heaters
  • Heat Exchanger Update WarmCair C26D
  • Technical Data and Fault Finding WarmCair DW Range
  • Technical Data
  • Fault Finding
  • Blocking Codes
  • Functional Wiring Diagrams
  • Reference Data. 

Fault Finding for Aquair Range

This manual will provide technical data and fault finding for the Aquair Range of Heat Interface Units.

Included within the document is:

  • MAF Stat connected not calling for heat (boiler not firing) when MAF Stat is on Max
  • Fan no operating when pipe is above 60oC
  • Circuit diagram


Should you need further assistance please email service@johnsonandstarley.co.uk