San Diego Air Conditioning and Heating - HVAC Blog

Welcome to R & C Heating and Air's Blog. Here you will find tips, info and advice on everything HVAC.


Common Air Conditioning Problems

Here are a few of the most common problems with air conditioners we come across.


Your unit isn't cooling properly



Your refrigernat could be low or leaking. Call a trained technician to repair the leak and recharge the system.

Thermostat Issues

Honeywll PRO 3000 Digital Non Programmable Thermostat

Check your thermostat to make sure it is set properly and it is reading the correct temperature.

Drainage Problems

Check your unit's drain to make sure it isn't clogged.

Dirty Filter

A clogged filter restricts airflow through the unit, decreasing its efficiency and reducing its ability to effectively cool the air.


Your unit isn't turning on


Electrical Control Failure

Your compressor and fan controls could be worn out from having system turn off and on too frequently.


Make sure your thermostat is working - it might need new batteries or might need to be replaced entirely.


Limited Airflow


Ductwork Problems

Your ducts could be clogged or be clogged or constricted. Work with a professional to clean and air seal your ducts.

Dirty Filter

A clogged filter restricts airflow through the unit, decreasing its efficiency and reducing its ability to effectively cool the air.


What you should know about your air supply grills


Many people do not realize how the improper use of air supply grills can effect your system in an adverse way. Each air supply grill is designed to circulate specific amounts of air throughout your home. You should never close your grills even if you don't use a particular room or area of the house, doing so will not save you any money and you could damage your cooling system. Your grills should be wide open at all times. If you would like to have certain areas of your home split into zones you should invest in a Zoning System that will allow you close off a certain area of your home using electronically installed dampers in the ducting system to restrict air flow to the ducts that are not in use.


home hvac maintenance tips slide show 6 638


Why is my air conditioner blowing warm air?


That is a question commonly asked around this time of year. There are many reasons why your air conditioner is blowing warm air but we will focus on a few of the most common reasons.

air conditioning freezed up


♦ No power to the outside air conditioning unit. The circuit breaker might have been tripped or the fuse for the AC has blown.

♦ There can also be a restriction of airflow to and from the Air Conditioner that causes the outside air conditioning unit to freeze up. This can be  caused by a dirty filter that has not been replaced in a long time or the coils might be dirty and you need your yearly maintenance by professional HVAC contractor .

♦ The Air Conditioning unit is low on refrigerant and needs a professional HVAC contractor to charge the system and check for and repair leaks.

The most important thing as a home owner is to check your filters monthly. And make sure to keep debris such as trim bushes, weeds, tall grass and dirt away from your outside unit this will prevent the outside unit to be clogged by dirt, leaves or debris that can keep your AC from properly running right.

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We service, repair & install all major brands of air conditioners, furnaces & tankless water heaters.


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R & C Heating and Air Inc.
627 E. Mission Rd
San Marcos, California 92069
 (760) 484 - 2116 & (760) 270 - 0811
CA LIC #927108