(Redirected from LBBB). Left bundle branch block (LBBB) is a cardiac conduction abnormality seen on the electrocardiogram (ECG). In this condition, activation of the left ventricle is delayed, which causes the left ventricle to contract later than the right ventricle.
For instance, in the winter, if you set the thermostat to 20Â°C (68Â°F), it will activate the heating system when the house temperature drops below 20Â°C and will shut the system off when the house air warms up past 20Â°C. A setback thermostat contains an electronic clock.
1. Check your thermostat to make sure it is in the On position. Ensure the thermostat is set on the appropriate setting -- Heat or Cool.. Check for any programming overrides on a programmable thermostat to confirm that the overrides are not impeding the thermostat operation.tand at the thermostat while an assistant stands at the furnace. Move the thermostat to heat. If your furnace is not within shouting distance from your thermostat, use walkie-talkies to communicate.