Heating controls not working properly thermostat problems

Tony requested 3 quotes from Heating Professionals in Bulleen

thermostat not working on lower temperatures, does work on higher temperatures; appliance is a GASGLO central heating

Cool Heat Pty Ltd

MELBOURNE HVAC SERVICES HEATING AND COOLING

Comfyhome Pty Ltd

Ducted air con / heater needs repair
Ducted split system is blowing out air but heater and air conditioner are not...

CENTRAL HEATING TO BE REPAIRED
CENTRAL HEATING TO BE REPAIRED

Fix brivis ducted heating system, saying error 55
Keeps cumming up with error 55 on brivis ducted heating controller. after...