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Lic. CAC1819196 · CFC1431159
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Heating Troubleshooting

Furnace Making Loud Banging?

Loud bang when furnace kicks on? Could be dangerous delayed ignition. Don’t ignore. CAC1819196.

Quick Answer

Furnace banging = (1) delayed ignition (gas accumulates before ignition, then “whoomp”, dangerous, need burner cleaning $279), (2) duct expansion pop (normal, but excessive = duct issue), or (3) failing blower motor. Delayed ignition can crack heat exchanger over time. Call (813) 343-2212.

Causes of Furnace Banging

Delayed Ignition (Dangerous)

Call a tech

Symptom: Loud “whoomp” when furnace starts.

Burner cleaning + inspection $279. Don’t ignore, cracks heat exchanger.

Duct Expansion Pop

Call a tech

Symptom: Mild pop as ducts heat up. Normal if occasional.

Excessive: duct securing $279-$499.

Blower Motor Failing

Call a tech

Symptom: Mechanical banging from air handler.

Blower motor $599-$899.

What to Do Right Now

  1. Note timing, at startup (ignition issue) or during run (duct/blower).
  2. Delayed ignition = don’t keep running, call us.
  3. Mild duct pops = usually OK.

FREE diagnosis. Burner clean: $279. Blower: $599-$899. Duct work: $79-$499.

FAQ

Delayed ignition dangerous?

Yes, can crack heat exchanger over time, releasing carbon monoxide. Fix within days.

Normal duct pops?

Occasional mild pops during temp changes = normal. Every startup loud = duct or furnace issue.

CO detector?

Every home with gas appliances needs one. $30 at any store. Critical.

How fast to fix?

Same-day Tampa. Delayed ignition issues prioritized.

Need Tampa Service Today?

Same-day Tampa Bay. FREE diagnosis. (813) 343-2212.

★★★★ 4.8 (1,339 verified reviews)
Verified4.8★ · 1,339 reviews
🛡 FL Licensed: CAC1819196 · CFC1431159💼 $1M General Liability + Workers’ Comp🏠 Family-owned since 2017⚡ Same-day service
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They worked on my AC and were very helpful and friendly. Definitely recommend them!!

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The technician Dusty from Home Therapist was extremely professional and truly went above and beyond. He was knowledgeable, courteous, and took the time to explain everything clearly while making sure the job…

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AC therapist are the best in this area. They explain everything that they find and what they recommend

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I had a great experience with Alejandro from Home Therapist Cooling, Heating, and Plumbing. He repaired two toilets and installed the water line to my new refrigerator after the delivery team refused…

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A big THANK YOU to Home Therapist Cooling, Heating and Plumbing for running sewer pipes to our RV and shed! Samuel was beyond amazing! He was prompt, professional, and his communication style…

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Reviewed by Richard MoralesCo-Owner & FL Class B Air Conditioning Contractor, Home Therapist

Richard co-owns Home Therapist Cooling, Heating, and Plumbing and holds the FL Class B Air Conditioning Contractor license (CAC1819196) since 2017. The company holds licenses CAC1819196 (FL Class B AC Contractor, Richard Morales) and CFC1431159 (FL Plumbing Contractor, Alex Morales), serving the Tampa Bay metro with a six-technician field team and 1,378+ verified five-star reviews.

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