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Main product image of T498 Beige Electric Heat Thermostat, w/ Range Stops, T498A1778
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T498 Beige Electric Heat Thermostat, w/ Range Stops, T498A1778
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T498A1778 has been discontinued
Discontinued May 1, 2026
This product was discontinued by the manufacturer.

Product Highlights

Product Highlight: Programmability
Non-Programmable
Product Highlight: Voltage
208V, 120v, 277v, 240v, Line voltage
Product Highlight: Stages
1 Heat
Product Highlight: Mount
Vertical
Product Highlight: Power Method
Hardwired
Product Highlight: Temperature Range (F)
40°F - 80°F

Description

Features
  • Easy to install; color-coded leads.
  • Include thermometer. Include long-lasting Micro Switch mechanism; makes on temperature fall.
  • Rugged, plastic mounting base.
  • Mount on standard 2 x 4 in. outlet box or 4 x 4 in. junction box.
  • Select models include extra knob decal for recalibration, if necessary.

Specifications
  • Amps (120V): 22
  • Amps (208V): 22
  • Amps (240V): 22
  • Amps (277V): 19

Specs

Application:

Electric Heat (Line Voltage)

Heat Only

Stages:

1 Heat

Programmability:

Non-Programmable

User Interface:

Mechanical

Mount:

Vertical

Power Method:

Hardwired

Voltage:

208V

120v

277v

240v

Line voltage

Temperature Range (F):

40°F - 80°F

Differential:

3°F

Switch:

SPST

Amperage:

22

19

Wattage:

2280 to 6094

Wiring:

6" Black and Red Leadwires

Frequency:

60 Hz

Color:

Beige

Height:

4-9/16"

Width:

2-7/8"

Depth (Inches):

1-15/16"

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Product Reviews

4.5 out of 20 reviews
89% would recommend this product
4.5
out of 20 Reviews
89% would recommend this product
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5 star
80%
4 star
5%
3 star
5%
2 star
5%
1 star
5%
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Most Liked Positive Review

Very helpful. Wrong controllers.

The gentleman my husband talked with was very helpful. Unfortunately, you do not carry the controllers we needed so we had to return these. We needed a 4 wire connection. The gentleman suggested we call Honeywell and we did. They were not helpful at all. Was on hold with them for more than 20 minutes. We hung up. Found an electrical company about an hour away that had what we needed. Thanks for your help.
VS

Most Liked Negative Review

Not consist

I purchased 6 of these thermostats. The quality control was totally not acceptable. Of the 6 thermostats purchase one was never installed because it was faulty and was replaced so we had to have the electrician return to install the replacement. Later, we had to have you replace two additiotrip by tenal thermostats because the were so poorly calibrated. The required a 3rd return of the electrician. We paid for three trip, all at the same amount
Showing 1-10 of 20 reviews

Supply House Always Comes Through

You can't beat the price or get better service than what you'll get from Supply House . I highly recommend them and have been highly satisfied each time I've ordered !
Jon j
Marmora NJ
3 years ago
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Yes I would be it again

Exact product
Parts orderer
Buffalo NY
4 years ago
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Exactly as advertised

Worked perfectly, easy and fast shipping
ACM
Ohio
5 years ago
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Put it on as soon as we got it and so far has worked fine.

This wasythe same style that has been in our house for 40 plus years and is replacing a new style that was replaced before so went with this one as we have several this style and have only had to replace the same one now again, but the other style did not last nearly this long.
PJS
North Dakota
6 years ago
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Very helpful. Wrong controllers.

The gentleman my husband talked with was very helpful. Unfortunately, you do not carry the controllers we needed so we had to return these. We needed a 4 wire connection. The gentleman suggested we call Honeywell and we did. They were not helpful at all. Was on hold with them for more than 20 minutes. We hung up. Found an electrical company about an hour away that had what we needed. Thanks for your help.
Jeff
Battle Creek Michigan
7 years ago
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great service

My thermostat came quickly and I had it installed and it works great!
Bird Watcher
MA
7 years ago
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Found it!

We have an older cabin with electric baseboard heaters and the replacement thermostat was really hard to find. Thank goodness you had one in stock.
KKV
Colorado
7 years ago
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Exactly what I was looking for.

You had the part I was looking for in stock, and the ease of ordering and receiving was great.
John
Whiting NJ
8 years ago
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I would buy this again, bought a dozen before.

We are using these to replace digital thermostats that are failing.
SWrecks
Everett, WA
8 years ago
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Atractive thermostat at a good price

I like everything about the product except the reliability. You have replaced two of the thermostats which did not function properly, and two of the installed thermostats are poorly calibrated, meaning that if you want 71 F, you have to set it at about 76 F.
Jim the fixer
Seattle, WA
8 years ago
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Product Q&A

6 Questions
6 Questions
ASK A QUESTION

Q: Is this a two wire unit?

Asked by Bob 11 years ago

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The 498A is a two pole, two-wire unit for 120V use. The 498B is a 4 pole unit for 230V use.

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Q: My old thermostats have a ground wire connected. The new ones are a plastic base with no ground. What do I do with the ground wire already in the box.

Asked by Bob 11 years ago

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Presuming that your ground wire is a bare copper wire, push it into the back of the box. It is not needed with the new thermostat. Figure 3, note 6 on the installation instructions mention this.

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Q: What is the difference between the Honeywell T498A1778 and the Honeywell T498A1810? Are they interchangeable?

Asked by Lockport 12 years ago

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Verified Author and ReplyVerified Reply- SupplyHouse Staff

T498A1778 includes range stops, a locking cover, and an extra knob and decal for recalibration. The thermostats are more or less interchangeable, although the T498A1778 is a better choice for building owners seeking to limit the amount of control occupants have over temperature settings.

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-

The ambient operating temperature range of the 1778 is 40F to 80F. The same range on the 1810 is 40F to 85F. The 1778 has an optional outdoor air sensor. The 1810 does not. Both have the same electrical ratings, operating voltage, 6" lead wires, etc. There appears to be no other difference. I would say that they are interchangeable.

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Q: 1 have a 240v base board heater and a 2 wire honeywell thermostat do i hook red from pannel to red form heater and to T1 and black from pannel and black from heater to L1 and all th grounds together?

Asked by 14 years ago

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Verified Author and ReplyVerified Reply- PexSupply Staff

We are not familiar with the wiring, but the manual linked below may help. http://s3.pexsupply.com/manuals/1328023701266/70863_PROD_FILE.pdf

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Q: is this thermostat new or rebuilt

Asked by 15 years ago

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Verified Author and ReplyVerified Reply- PexSupply Staff

This thermostat is new from the manufacturer. All products on PexSupply.com are new and not refurbished.

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Q: Is there an updated version of this? Perhaps even programmable?

Asked by Mike 15 years ago

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Verified Author and ReplyVerified Reply- PexSupply Staff

We would recommend that you use the TL8100A1008 thermostat: http://www.pexsupply.com/Honeywell-TL8100A1008-Multi-Application-7-Day-Programmable-Electronic-Thermostat-14526000-p

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