Frequently Asked Questions
At Hoffmann Brothers, we want our customers to feel confident and informed about what your home needs and how we can help you stay on top of it. The following questions cover all of the most-googled topics in our service departments, and some are accompanied by a video of one of our technicians explaining the answer in their own words.
If you have questions that aren’t answered here, please feel free to call us at (314) 256-2970.
HVAC FREQUENTLY ASKED QUESTIONS
- Can adjusting my thermostat save money?
- Do heat pumps work in hot weather?
- How can I prevent HVAC breakdowns?
- How long does an HVAC system usually last? ▶
- How often should I change my filter?
- How often should I replace my HVAC filter?
- How often should my AC unit be serviced? ▶
- Repair or replace my system?
- Should I have my ducts cleaned?
- What are the signs my HVAC needs maintenance? ▶
- What causes short cycling?
- What causes weak airflow from vents?
- What is the ideal indoor humidity level? ▶
- What is the ideal indoor temperature for summer comfort?
- What size HVAC filter should I use?
- What size system do I need? ▶
- Why are my evaporator coils frozen?
- Why does my HVAC system run constantly?
- Why does my system smell like something is burning?
- Why is my AC freezing up? ▶
- Why is my AC running but not cooling?
- Why is my air conditioner making loud or strange noises?
- Why is my electric bill so high when I run the AC?
- Why is my furnace blowing cold air?
- Why is my system leaking? ▶
- Why is one room hotter or colder than the rest?
- Why won't my AC turn on at all?
- Why won't my furnace ignite?
PLUMBING FREQUENTLY ASKED QUESTIONS
- Can I install a new faucet or showerhead myself? ▶
- How do I know if I have a hidden plumbing leak?
- How do I locate and shut off my main water supply?
- How do I unclog a sink or slow drain? ▶
- How much does a plumber cost per job?
- How much does water heater replacement cost? ▶
- How often should I have my plumbing inspected or maintained?
- How to fix a leaking faucet ▶
- Should I use Drano? ▶
- Signs my water heater is failing ▶
- What can I put in a garbage disposal and what should I avoid? ▶
- What causes a clogged drain?
- What causes a clogged toilet?
- What to do in a plumbing emergency
- What's a good alternative to Drano?
- Why does my drain gurgle and what does it mean?
- Why does my toilet keep running? ▶
- Why is my water pressure low?
ELECTRICAL FREQUENTLY ASKED QUESTIONS
- Are two-prong outlets safe?
- Can I add an outlet to an existing circuit?
- Can I do electrical work myself?
- Do I need a backup generator?
- Do I need a permit for electrical work? ▶
- How can I protect my home from power surges?
- How do I know if I need an electrical panel upgrade?
- Is aluminum wiring safe?
- Is my panel safe?
- Should I install a whole-home surge protector?
- What causes outlets to stop working?
- What does EV charger installation require at home?
- What does it mean if my breaker won't reset?
- What is a GFCI? ▶
- What is the difference between a fuse and a breaker?
- Why are my lights flickering? ▶
- Why do my light bulbs keep burning out quickly?
- Why does my breaker keep tripping? ▶
- Why does my power go out during storms? ▶
- Why is it important for my panel to be labeled? ▶
- Why is my outlet buzzing?
- Why is my outlet sparking when I plug something in?
- Why is my outlet warm? ▶
- Why is one outlet not working?
APPLIANCE FREQUENTLY ASKED QUESTIONS
- Can you install a new appliance if the space or cabinets don't fit perfectly?
- Do I need a permit to install a gas appliance (range-dryer) or run a gas line?
- Does Hoffmann Brothers haul away my old appliance when you install the new one? ▶
- How often should I clean my dryer vent and is it a fire risk?
- What causes a refrigerator to leak water onto the floor?
- What does it mean when my washer is leaking water?
- What should I do before an appliance installer arrives?
- Why does my dishwasher smell bad? ▶
- Why does my electric cooktop burner stop working?
- Why does my gas stove click but not light?
- Why is my dishwasher leaving dishes dirty or cloudy?
- Why is my dishwasher not draining?
- Why is my dryer making a loud squealing grinding noise?
- Why is my dryer taking so long to dry? ▶
- Why is my freezer frosted over? ▶
- Why is my microwave running but not heating?
- Why is my washing machine not draining?
- Why is my washing machine not spinning?
- Why isn't my refrigerator cooling? ▶
- Why won't my dryer heat up? ▶
- Why won't my oven heat up (or it heats unevenly)?
St. Louis
Explore the services we
offer at our St. Louis Location!
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(314) 664-3011
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3700 Rider Trail South Suite 100
Earth City, MO 63045
Nashville
Explore the services we
offer at our Nashville Location!
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(615) 515-3015
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45 Willow St
Nashville, TN 37210