No. The thermostat is not likely to be the cause.
Yes, a faulty thermostat can cause the heating system to blow cold air. If the thermostat is not functioning properly, it may not signal the furnace to turn on and produce warm air. It's important to have a professional inspect and replace the thermostat if needed to ensure proper heating.
Bad thermostat
If the unit started it`s probably not the stat.
Low coolant, bad coolant, blockage in the coolant line, bad heater core or element, bad thermostat
too much anti freeze, bad or no thermostat.
Low coolant? Control cable not adjusted properly Bad thermostat?
Check coolant level May be a bad thermostat System may be airbound
Could be low coolant, stuck thermostat, bad heater control head (if climate control)
most likely it's a bad thermostat, or your vents not working properly.
Low on coolant. Bad thermostat. Plugged heater core. Temp blend door inop.
Your thermostat is most likely bad. It controls the flow of warm water into your heater core which warms your air. Its a common problem in winter and an easy fix.
Low coolant? Bad thermostat? Heater core plugged, restricted or airbound? Bad heater control? Water pump not circulating coolant?