Before You Call


Professional heating repair in Wentzville

For the very best heating repair, maintenance, or installation in Wentzville call C & S Heating and Cooling today at (636) 327-4238. Our company has been serving the Wentzville community for over 30 years. Call us now and schedule your routine HVAC maintenance or repair.

Before you call

Before calling for HVAC emergency service, please read the tips below. It may prevent a service call or help us diagnose your problem quicker.
Charging a residential heating system in Wentzville

Air conditioner - no cooling

  • Check the settings on your thermostat. Make sure the temperature control selector is set below the current room temperature, and the system switch is on the COOL or AUTO position. The fan switch should be set to ON for continuous airflow or AUTO if you want the blower to operate only while the air conditioner is operating.
  • Try to get the air conditioner to turn on by lowering the thermostat to its lowest temperature setting.
  • If the air flow out of your registers seems low, check the air filter. An extremely dirty air filter can block air flow.
  • Make sure all registers are open and not obstructed.
  • Check the power disconnect switch by each unit (outdoor and indoor).
  • Check the fuse/breaker at the electrical panel for both the outdoor and indoor unit.
  • If the problem persists, please call us.

Heat pump - no cooling

  • Check the settings on your thermostat. Make sure the temperature control selector is set below the current room temperature, and the system switch is on the COOL or AUTO position. The fan switch should be set to ON for continuous airflow or AUTO if you want the blower to operate only while the heat pump is operating.
  • Try to get the heat pump to turn on by lowering the thermostat to its lowest temperature setting.
  • If the air flow out of your registers seems low, check the air filter. An extremely dirty air filter can block air flow.
  • Make sure all registers are open and not obstructed.
  • Check the power disconnect switch by each unit (outdoor and indoor).
  • Check the fuse/breaker at the electrical panel for both the outdoor and indoor unit.

Heat pump - no heat

  • Check the settings on your thermostat. Make sure the temperature control selector is set above the current room temperature, and the system switch is on the HEAT or AUTO position. The fan switch should be set to ON for continuous airflow or AUTO if you want the blower to operate only while the heat pump is operating.
  • Try to get the heat pump to turn on by raising the thermostat to its highest temperature setting.
  • If the air flow out of your registers seems low, check the air filter. An extremely dirty air filter can block air flow.
  • Make sure all registers are open and not obstructed.
  • Check the power disconnect switch by each unit (outdoor and indoor).
  • Check the fuse/breaker at the electrical panel for both the outdoor and indoor unit.
  • If the problem persists, please call us.

Gas furnace - no heat

  • Check the settings on your thermostat. Make sure the temperature control selector is set above the current room temperature, and the system switch is on the HEAT or AUTO position. The fan switch should be set to ON for continuous airflow or AUTO if you want the blower to operate only while the furnace is operating.
  • Try to get the furnace to turn on by raising the thermostat to its highest temperature setting.
  • If the air flow out of your registers seems low, check the air filter. An extremely dirty air filter can block air flow.
  • Make sure all registers are open and not obstructed.
  • Check the power disconnect switch by the furnace.
  • Check the fuse/breaker at the electrical panel for the furnace.
  • Check to make sure the gas control valve to the furnace is open.
  • Check the pilot light. (Electronic ignitions will not have a pilot light).
  • If the problem persists, please call us.

Gas/oil boiler - no heat

  • Check the settings on your thermostat. Make sure the temperature control selector is set above the current room temperature, and the system switch is on the HEAT or AUTO position.
  • Try to get the boiler to turn on by raising the thermostat to its highest temperature setting.
  • Check the power disconnect switch by the boiler.
  • Check the fuse/breaker at the electrical panel for the boiler.
  • Check to make sure you have fuel oil or check to make sure the gas control valve to the boiler is open.
  • Check the pilot light. (Electronic ignitions will not have a pilot light).
  • If the problem persists, please call us.

Geothermal - no cooling

  • Check the settings on your thermostat. Make sure the temperature control selector is set below the current room temperature, and the system switch is on the COOL or AUTO position. The fan switch should be set to ON for continuous airflow or AUTO if you want the blower to operate only while the system is operating.
  • Try to get the system to turn on by lowering the thermostat to its lowest temperature setting.
  • If the air flow out of your registers seems low, check the air filter. An extremely dirty air filter can block air flow.
  • Make sure all registers are open and not obstructed.
  • Check the power disconnect switch by each unit (outdoor and indoor).
  • Check the fuse/breaker at the electrical panel for both the outdoor and indoor unit.
  • If the problem persists, please call us.

Geothermal - no heat

  • Check the settings on your thermostat. Make sure the temperature control selector is set above the current room temperature, and the system switch is on the HEAT or AUTO position. The fan switch should be set to ON for continuous airflow or AUTO if you want the blower to operate only while the system is operating.
  • Try to get the system to turn on by raising the thermostat to its highest temperature setting.
  • If the air flow out of your registers seems low, check the air filter. An extremely dirty air filter can block air flow.
  • Make sure all registers are open and not obstructed.
  • Check the power disconnect switch by each unit (outdoor and indoor).
  • Check the fuse/breaker at the electrical panel for both the outdoor and indoor unit.
  • If the problem persists, please call us.
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