We recently replaced our old thermostat with a new Noma 5+1+1 thermostat. The furnace used to come on and run for a while, bringing the temperature to 1 degree higher than it was set for. Now it is set for 20.0 C and it comes on at 19.2 and goes off at 19.6. it doesn't even bring the temperature to what we have it set for. It runs for 2-3 minutes, shuts off and then comes back on again in 3-5 minutes and does the same thing over and over. What can we do to remedy this situation, if anything. Thank you for any input you may have
Ruthiemck